G&G/HIGP Seminar Series

Past TGIF Seminars

April 8 - Pete Mouginis Mark - The Cassini/Huygens Mission to Saturn and Titan

April 1 - Brian Glazer - In situ voltammetry for investigating geomicrobial synergy within oxic-anoxic transition zones

March 18 - Pat Hughes - Subsurface Contamination by Oil Plumes in Tidally Influenced Zones: Implications for Mobility, Risk, and Recoverability

March 11 - Mike Garcia - Ko`olau volcano repeatedly slip slides away

March 4, Juan Pablo Canales - Upper crustal structure and axial topography at intermediate-spreading ridges: Seismic constraints from the Southern Juan de Fuca Ridge

February 25, Mladen Nedimovic - From accretion to subduction: Structure and evolution of the oceanic Juan de Fuca plate

February 18, Tarun Dalai - Marine 187Os/188Os record across the Eocene-Oligocene transition: Chemostratigraphy, meteoric shower and climate change

February 11, Jody Webster - Carbonate Platform and Reef Drowning: New insights from Papua New Guinea and Hawaii

January 28, Charles Werner - Differential Interferometric SAR techniques and applications

January 21,  Ketil Sorensen - Mysteries of deep subsurface sediments - unknown life forms and a parallel universe 

January 14, Thorsteinn Thorsteinsson - Ice core studies on polar and temperate ice caps

January 13, Darren Williams - Influence of climate and surface type on the appearance of distant Earth-like planets.

December 3, Greg Ravizza — Continental flood basalts and climate change: Can osmium isotope stratigraphy reveal connections?

November 19, Steve Martel — How fault interaction can affect how faults slip

November 12, Gerard Fryer — The Tsunami of April 1, 1946: The Missing Landslide

November 5, Gerard Fryer — Kelvin, the age of the Earth, and the death of uniformitarianism (or "How to keep intro students awake")

October 29, Mike Fuller — Magnetostratigraphy and highlights of ODP Legs in the Southern Oceans

October 22, Jackie Caplan-Auerbach — Repeating coupled earthquakes at Shishaldin Volcano, Alaska: a potential window into the volcanic conduit

October 15, Georg Zellmer —Magma evolution and ascent at volcanic arcs: constraining petrogenetic processes through rates and chronologies

October 8, Jeff Witter —Circulation of Magma in the Volcanic Conduit as a Degassing Mechanism at Villarrica Volcano, South Chile

October 1, Peter Mouginis-Mark — The Latest Adventures of the Mars Exploration Rovers

April 30, Jeff Keaton —How earth fissures form, problems they cause, challenges for predicting where they form and how fast they propagate, and mitigation strategies for protecting facilities from damage.

April 16, Barbara Keating —Tsunami vs. Storm deposits at Hawaii Kai (Queens and Sandy Beach) and Evidence for island uplift of Oahu, implications for tsunami research.

April 08, Thom Ahrens —Shock-induced Melting of MgSiO3 (perovskite): Implications for Density of Ultramafic Liquids above Core-Mantle Boundary

April 04, Don Brownlee —Geology and Cometology of Comet Wild 2 - A Young Jupiter Family Comet

March 19, Karen Harpp and Dennis Geist —Origins of Volcanism in the Galapagos Islands

March 19, Dr. Mario Cachao —Calcareous nannofossils in shelf environments

March 05, Andy Harris —The role volcanism in shaping the awesome geology of the great nation of Cornwall

February 27, David Sandwell — Warping and Cracking of the Pacific Plate by Thermal Contraction

February 20, Brian Taylor —Submarine canyons, submerged shorelines and rejuvenated volcanism around Kauai (no landslides)

February 13, Brian Taylor —Processes of Continental Break-up and Initial Seafloor Spreading as Observed in the Woodlark Basin, Papua New Guinea

February 06, Peter J. Mouginis-Mark —The Latest and Greatest Mars Rovers

January 30, Garrett Ito —What do we really know about mantle convection and composition anyway?

January 22, Mark Behn —Upper Mantle Flow Associated with the African Superplume

January 16, Kanani Lee —Equations of state of the high-pressure phases of a natural peridotite and implications for the Earth's lower mantle

December 19, Peter Vitousek —Sources of Nutrients during Long-Term Ecosystem Development

December 05, Sam Bonis —The Geology of Guetemala

November 21, Barbara Keating —Megatsunami Megacontroversy

November 14, Barbara Keating —Landslides and Tsunami

November 7, Mike Mottl —Glaciology/Plate Motion Film Festival

October 31, Margo Edwards —Arctic Horrors

October 24, Kevin Harrison —Can increased silica input explain the glacial/interglacial pCO2 transition?

October 17, Sarah Fagents —Cryovolcanism on Europa: Fact or Fiction?

October 10, Mike Mottl —Chemistry of springs across the Mariana forearc shows progressive devolatilization of the subducting plate.

October 3, Joseph Smyth —Searching for Earth's Lost Oceans: Laboratory Odyssey

September 26, Jeffrey Taylor —Evolution of the Martian Crust: Evidence from Elemental Mapping by the Mars Odyssey Mission

September 19, Mike Fuller —The Paleomagnetic records of the Moon and Mars

September 12, Chris Peterson —Amateur Astronomy on Oahu.

September 05, Costanza Bonadonna —Probabilistic modeling of tephra dispersion: hazard assessment of a multi-phase rhyolitic eruption at Tarawera, New Zealand

August 29, Yasushi Harada —Hotspot drifts or true polar wander?

August 22, Roger Buck —How magma pressure and tectonic stress can control dike intrusion with applications to the Krafla (Iceland) 1975-1984 diking episode.

August 01, Fred Frey —Formation of the Kerguelen Large Igneous Province, Gondwana Breakup, Lost Continents and Growth of the Indian Ocean

July 11, Charles Helsley —Environmental Monitoring in the Vicinity of Aquaculture cages off Oahu

June 09, Glenn Thompson —Recent Advances in Monitoring at the Montserrat Volcano Observatory Environmental Monitoring in the Vicinity of Aquaculture cages off Oahu

May 30, Mac Rutherford —The nature and timing of magma interaction processes in arc volcanic systems from rocks and phase equilibria experiments

May 22, Juli Morgan —The Failure and Stabilization of Kilauea Volcano: Seismic Surveys, Submersible Dives, and Numerical Simulations

May 9, David Cacchione —Internal Waves and Sedimentation on Oceanic Slopes

May 2, 2003, Lionel Wilson —Volcano-cryosphere interactions on Mars

April 25, 2003, Scott Rowland —A remote view of the two most recent Galapagos eruptions

April 17, 2003, Fred Duennebier —Opportunities for Ocean Observatories - re-use of retired cable systems

April 11, 2003, Andy Harris —The FLOWGO lava flow model: how it works and what you can do with it

April 4, 2003, Mark Behn —Constraints on the composition of the lower continental and oceanic crust from seismic velocity measurements.

March 28, 2003, Joel Blum —Forest Biogeochemistry of Calcium: Acid rain, mineral weathering and a whole-watershed calcium addition.

March 21, 2003, Yasushi Harada —Nazca absolute plate motion and Pacific basin inter-hotspot motion

March 13, 2003, Dave Sherrod —Haleakala: one million years of postshield history and not a rejuvenated-stage lava in sight

March 7, 2003, Greg Ravizza —Impacts, glaciation and weathering: the marine osmium isotope record of the Eocene-Oligocene transition.

February 28, 2003, Makoto Murakani —Magmatic Processes Revealed by Multidisciplinary Monitoring on Active Volcanoes

February 21, 2003, Stefanie Brachfeld —Holocene Behavior and Stability of the Larsen-A Ice Shelf, Antarctic Peninsula

February 20, 2003, Mladen Nedimovic —3D structure from 2D seismic reflection surveys

February 14, 2003, David Green —Melting in the Modern Upper Mantle ---how the subtleties of melting in lherzolite with small contents of H and C, and variable O-fugacity control the mantle solidus, lithospheric thickness, and the characteristics of primary magmas.

February 11, 2003, David Green —Island Arc Ankaramites: Vanuatu ankaramitic picrites: parental magmas and conditions of genesis,and comparisons with boninites and other primary magmas. Constraints on Mantle Potential Temperature.

February 7, 2003, Ole Peters —Rain and Self-Organized Criticality

January 31, 2003, Charles Helsley —Resources in the 21st Century: A look at what the not-too-distant future holds for population, land, food, water and energy.

January 17, 2003, Cecily Wolfe —High Precision Relocations of Hawaiian Earthquakes

January 10, 2003, Thor Thordarson —Volcanic architecture of mafic and ultramafic (komatiite) flood lavas: testimony of lava inflation and insulated flow emplacement

November 22, 2002, Brian Taylor —Back-arc Basin Basalt Systematics (AKA: a geophysicists foray into geochemistry)

November 15, 2002, Eric Gaidos —Discovery of an Active Micobial Community in a Subglacial Volcanic Crater Lake, Iceland

November 13, 2002, Graham E. Fogg —Groundwater Vulnerability and the Meaning of Groundwater Age Dates

November 13, 2002, Graham E. Fogg —A Geologic Approach to Simulation of Subsurface Hydrology

November 12, 2002, Graham E. Fogg —Plume Behavior in Heterogeneous Geologic Systems: Natural Attenuation, Remediation, and the Role of Diffusion

November 8, 2002, Mike Coffin —Tales of Two LIPs: Kerguelen and Ontong Java

November 6, 2002, Mike Coffin —Subduction Initiation along the Macquarie Ridge Complex?

November 4, 2002, Jackie Caplan-Auerbach —Installation of a seismic network at Okmok Volcano, Alaska

November 1, 2002, Daniel Sigman —Cold Climates, Polar Ocean Stratification,And Atmospheric Carbon Dioxide

October 25, 2002, Ben Brooks —An Andean Microplate?

October 23, 2002, Daniel Fornari —Recent Near-Bottom Mapping and Sampling at the Galápagos Rift 86°-89.5°W and East Pacific Rise 9° 27'-50'N

October 18, 2002, Bill Spence —Sea-floor Exploration of the Cheap with Fractal Shape-Shifting Robots

October 11, 2002, John Mahoney —Pin-pricking the Elephant: the Nature, Origin, and Fate of the Ontong Java Plateau

October 4, 2002, Robert Whittier & Aly El-Kadi — Understanding Hawaiian hydrogeology, are we a step closer?

September 27, 2002, Barbara Cohen — The Lunar Cataclysm, or They sure had it rough 3.9 billion years ago

September 20, 2002, Robert Yonover — Surviaval Technoloby Born in Hawaii

September 13, 2002, Jason Phipps Morgan — Serpentinization and Slab-Bending

September 06, 2002, Roger Bilham — Death and construction – Earthquakes on an Urban Planet with examples from India

August 30, 2002, Bob Duncan — Assessing Motion of the Hawaiian Hotspot--Preliminary results of the Paleolatitude Test from ODP Leg 197

August 23, 2002, Brian Taylor — The Maiden Voyage of R/V KILO MOANA--Results of Mission Trials and the status of our new ship

TUESDAY July 2, 2002, Rhett Butler – Hydroacoustic Seismic Signals Recorded Near Hawai'i

May 17, 2002, Eric Gaidos — Elements of Planetary Habitability

May 10, 2002, John Sinton, Buffy Cushman, Tanya Blacic, and Garrett Ito — Plume-Ridge Interaction along the Galápagos Spreading Center

April 12, 2002, John Booker – Electrical conductivity structure beneath the Sierras Pampeanas of Argentina

April 5, 2002, Chip Fletcher – Review and Advances in the Carbonate Geology of Oahu

March 22, 2002, Neil Frazer — Gibbs Sampling, Simulated Annealing, Genetic Algorithms & All That

March 15, 2002, Steve Martel — How do Faults Form?

March 8, 2002, Gerard Fryer — The tsunami of April 1, 1946: the enigma is solved, but our troubles are just beginning...

March 6, 2002, Steve Ingebritsen — Subsidence due to Groundwater Withdrawal

March 1, 2002, Falk Amelung — Remote Sensing of Land Subsidence and Earthquakes

February 22, 2002, Barry Lienert — Rising or Falling? Aerosol Distributions at Bellows Beach Measured with a Scanning Lidar

February 15, 2002, John Delaney — The NEPTUNE Observatory and beyond

February 8, 2002, Milton Garces — Listening to the hidden sounds of volcanoes, meteors, storms, pounding surf, and big things unknown

February 1, 2002, Luke Flynn, Assessment of Global Volcanic Activity in Near Real-Time

January 23rd, 2002, Goran Ekstrom — Anisotropic Structure of the Pacific upper mantle

January 24, 2002, Meredith Nettles — Unusual Earthquakes Near Volcanos: Iceland, Hawaii, and Japan

January 25, 2001, Jim Zimbelman — Differential Global Positioning System topographic measurements applied to Geomorphology

January 18, 2002, Joseph Shacat — Large vertical separation in dissolved Fe & Mn peaks in five Antarctic lakes: Implications for trace metal cycling; and Matt Parry —Trophic ecology of two oceanic squids in Hawaiian water

TUESDAY January 10, 2002, Douglas Pyle Eastern Indian Ocean seafloor - a record of Pacific and Indian MORB mantle sources and mantle dynamics

November 30, 2001, Brian Taylor — Active Extension in the Gulf of Corinth, Greece

November 23, 2001, Brian Taylor, Back-arc Spreading in the Lau Basin - Similarities and Differences to Mid-Ocean Ridges

November 16, 2001, Michael Garcia — A Multi-Discipline Approach to Understanding Hawaiian Giant Submarine Landslides

November 7, 2001, Peter W. Ward — Mass Extinctions: Past, Present, and Future?

October 26, 2001, Jackie Caplan Auerbach — Shisaldin Volcano and the Alaska Volcano Observatory

October 19, 2001, Peter Mouginis-Mark — Mars Odyssey 2001: NASA's latest contribution to an on-going series of new missions to Mars

August 31, 2001: Margherita Polacci — Textural heterogeneities in pumices from volcanic explosive eruptions and implications for magma ascent dynamics, 4pm.

September 7, 2001: Julia Sable and Bruce Houghton — The July-August 2001 eruption of Etna volcano: the first 7 days, 4pm.

August 24, 2001: Victoria E. Hamilton — Understanding Mars' Geologic History Through Mineralogy: Studies in the Thermal Infrared, 4pm.

August 16, 2001: Lucia Gurioli, The eruption of Thera (1628 BC) and Vesuvius (79 AD): precursors and destructive events in the archaeological areas, 4pm.

August 10, 2001: Aaron Pietruszka, Recent eruptive history and magmatic processes of Loihi Seamount inferred from U-series isotopes and other geochemical tracers, 4pm.

August 3, 2001: Mike Fuller, Biomagnetism: effects of magnetic fields on life from bacteria to us., 4pm.

July 27, 2001: Dawn Pirie, Near real-time, rim-based thermal monitoring at Pu'u 'O'o - Huey, Dewey & Louie tell all!, 4pm.

July 20, 2001: Rhett Butler, The Global Seismographic Network: a multi-use facility for science, 4pm.

July 13, 2001: David Gubbins, How the Earth's magnetic field reverses, 4pm.

June 29, 2001: Paul Segall, Insights into the dynamics of Kilauea volcano from Global Positioning System measurements, 4:00 pm.

May 25 , 2001: Loren Kronke, The Initiation of Subduction, Forced Changes in Absolute Plate Motions, and the Breakup of Continents, 4:00 pm

May 11 , 2001: Scott Hughes, Quaternary basaltic volcanism on the eastern Snake River Plain, Idaho, USA, 4:00 pm

May 18, 2001: Garrett Ito, Mantle flow and melting of plumes near mid-ocean ridges, 4:00 pm

May 4, 2001: Julia Hammer, Textural and experimental constraints on magma storage, ascent, and eruption dynamics, 4:00 pm

April 27, 2001: Jun Korenaga, The origin of the Iceland `hotspot', 4:00 pm

April 24, 2001: Andrew Harris, The Evolution Of Thermal Remote Sensing 1957 - 2001 And Its Contribution To Volcanology,4:00 pm

April 16, 2001: Dennis Geist, Galapagos magma chambers, 4:00pm

March 30, 2001: Billy Moore, Material Fluxes to the Coastal Ocean from Submarine Groundwater Discharge

March 9, 2001: John Bailey, The Changing Face of Pinatubo Through Space and Time

February 23, 2001: Jean Battaglia,Seismic quantification of magmatic processes on the Piton de la Fournaise,

February 16, 2001: Jan Veizer, Four Billion Years of the Carbon Cycle: What's the Message for Us,

February 13, 2001:Kathleen Crane, Thermal Rejuvenation Along the Senja Fracture Zone: Implications for the Production and Release of Methane Into the Northern Oceans ,

February 9, 2001: Margo Edwards, SCICEX 99: Arctic Discoveries,

February 2, 2001: Atilla Aydin, The 1999 Izmit, Turkey Earthquake,

January 19, 2001: Brad Linsley, Decadal Sea Surface Variability in the Subtropical South Pacific from 1726-1997 A.D,

January 12, 2001 : Andy Harris, How the Italian Volcanoes Work: Gas Pistoning at Stromboli, Migratory Fumaroles at Vulcano and Foam Soup at Etna,

December 12, 2000: Claudia Benitez-Nelson, Phosphorus Cycling in the Upper Ocean: What Does it Mean for Climate Change?,

December 8, 2000: James Whitey Hagadorn, The Precambrian-Cambrian transition: Insights from soft-bodied and biomineralized disaster taxa ,

December 5, 2000: Thomas Marchitto, Cadmium, Zinc and Deep Atlantic Circulation During the Last Glacial Maximum,

December 1, 2000: David Bercovici, A two-phase theory of damage, shear localization and plate boundary generation,

November 30, 2000: Ken Severin, Ways to make electron microprobe analyses more understandable,

November 28, 2000: Elisabeth Sikes, Old radiocarbon ages in the southwest Pacific Ocean during the last glacial period and deglaciation,

November 21, 2000: Eric Gaidos, Children of the Snowball: Climatic Calamity, Ecological Catastrophe, and Biological Complexity,

November 17, 2000: Tori Hoehler, Thermodynamics of H2 in marine sediments: quantitative chemistry at the biology-environment interface,

November 8, 2000: Bruce Shaw, The Physics of Earthquakes: Integrating Theory and Observations

November 3, 2000: Richard J. Arculus, Oceanic plateau and arc-ridge interactions: the Solomon Islands

October 30, 2000: Kent Ross, Arc-Like Cumulates from the Mid-Atlantic Ridge

October 27, 2000: Janet Becker, Theoretical Models of Granular Flows: Applications to the Formation of Beach Morphology.

October 20, 2000: Subir Banerjee, The Chinese Emperor's New Clothes: Perspective of an Environmental Magnetist.

October 18, 2000: Subir Banerjee, Early Diagenesis in Loess towards forming Nano-Phase Magnetite:Inorganic or Biomediated?

October 16, 2000: Stephan Grilli, Prediction of Underwater Landslide Tsunamis in a Numerical Wave Tank: Comparison with Laboratory Experiments.

October 13, 2000: Mike Garcia, Rock Stories from the Hawaii Scientific Drilling Project

October 6, 2000: Donald M. Thomas, The Hawaii Scientific Drilling Project: Ocean Islands and Mantle Plumes.

September 29, 2000: Mike Carr, Oceans and the Martian Drainage System: Where did all the Water go?

September 27, 2000: Mike Carr, Climatic Implications of Mars Global Surveyor Observations of Martian Valley Networks, Fretted Channels, and Recent Gullies.

September 22, 2000: Gerard Fryer,Two Great Tsunamis, Two Seismological Blunders.

September 15, 2000: Sean Solomon, Unanswered (but Answerable) Questions on the Formation, Thermal History, Magmatism, Magnetic Field Generation, and Volatile Inventory of Earth-like Planets: Opportunities at Mercury.

September 14, 2000: Sean Solomon, Volcanic-Climatic-Tectonic Coupling on Earth-Like Planets: Venus and Mars.

September 13, 2000: William W. Sager, Late Cretaceous Polar Wander of the Pacific Plate: A Rapid True Polar Wander Event.

September 12, 2000: Sean Solomon, The Role of Plate Tectonics in Terrestrial Planet Evolution: Mars and Venus

September 11, 2000: Sean Solomon, Early differentiation of Earth-like planets: Moon and Mars.

September 8, 2000: Falk Amelung, Watching Volcanoes Change in Shape With Spaceborne Radar Interferometry.

July 28, 2000: Freddy Corredor, Mesozoic-Cenozoic Structural Evolution of the Northern Eastern Cordillera Fold Belt, Colombia.

July 21, 2000: Lutz Nasdala, Radiation Damage in Minerals.

July 14, 2000: Garry Karner, The Tectonic Significance of Stratal Geometries and Sequence Stratigraphy: Application to the Northwest Australian Margin.

June 27, 2000: Richard J. Walker, Asteroidal Cores and Planetary Accretional Veneers: Isotopic Insights

May 5, 2000: Michael Gurnis, The Geodynamic History of the Australian Region Since the Jurassic

May 4, 2000: Michael Gurnis, Dynamics and Structure of the Lowermost Mantle

April 28, 2000: Casey Moore, Fault Zone Imaging, Compartmentalization and Evolution into the Seismogenic Zone

April 14, 2000: Donald W. Forsyth, Flow and Melt Generation Beneath a Mid-Ocean Ridge: Constraints from the MELT Experiment

April 13, 2000: Donald W. Forsyth, Seafloor Spreading Near the Amsterdam-St. Paul Hotspot on the Southeast Indian Ridge

April 7, 2000: Brian Taylor, Continental Breakup Observed in Papua New Guinea .

March 24, 2000: Maria Zuber, The Topography and Internal Structure of Mars from Mars Global Surveyor.

March 22, 2000: Maria Zuber, Quantitative Analysis of Shear Localization and Application to Large-Scale Tectonics.

March 17, 2000: Andy Harris, A Real-Time, Rim-Based Thermal Monitoring Capability Planned for Pu'u 'O'o.

March 10, 2000: Michael O. Garcia, Magmatic Processes at Kilauea Volcano as Revealed by the Ongoing Pu'u 'O'o Eruption.

March 9, 2000: Neil C. Sturchio, Revelations at the Mineral-Fluid Interface with Synchrotron Radiation.

March 3, 2000: John Hayes, Molecular-Isotopic Studies of Geomicrobiological Processes.

March 2, 2000: John Hayes, Compound-Specific Hydrogen Isotopic Analyses, Techniques and Initial Applications.

February 25, 2000: Kevin McKeegan, Short-lived Radioactivity in the Solar Nebula: Clock or Crock?

February 23, 2000 : Kevin McKeegan, Oxygen Isotopic Constraints on the Origin and Evolution of Refractory Components of Chondritic Meteorites and Micrometeorites

February 18, 2000: Servando De la Cruz-Reyna, Recent volcanic activity in Mexico.

February 16, 2000: Shane J. Cronin, Debris Avalanche, Seismic, Tsunami and Volcanic Hazards of Uluinabukelevu (Mt Washington) Kadavu, Fiji .

February 11, 2000: Thomas H. Jordan, Seismological Structure of the Western Pacific Upper Mantle and its Geodynamical Implications.

February 9, 2000: Thomas H. Jordan, Geosystems at MIT: A New Approach to Graduate Education in the Geosciences.

February 4, 2000: S. A. Morse, A Double Magmatic Heat Pump at the Core-Mantle Boundary.

January 28, 2000: Yasushi Harada, A Global Analysis of Absolute Plate Motions, Motion Between Hotspots, and Polar Wandering.

January 21, 2000: Thomas L. Wright, Understanding Kilauea and Mauna Loa Volcanoes: The Contribution of Early Seismic Observations.

January 14, 2000: Mike Widdowson, Uplift and Erosion in the Deccan: A Story of Lavas, Laterities, and Earthquakes.

December 10, 1999: Yucheng Pan & Rodey Batiza, Crystals Can Talk AND They Have Interesting Things to Say; Garrett Ito & Stephen Martel, Dike Interaction and Implications for Magma Transport in the Crust and Mantle.

December 3, 1999: John Sinton, Looking Down on Magma Chambers Beneath Mid-Ocean Ridges: Results of the STOWA Cruise on the Southern East Pacific Rise.

December 1, 1999: Eberhart Grun, Detection and Interpretation of Dust Particles on Interplanetary Missions.

November 19, 1999: Gerard Fryer, Hot Spots, Great Earthquakes, and Back-Arc Spreading.

November 12, 1999: Gerard Fryer, Landslide! Tsunami! The Events at Fatu Hiva on September 13, 1999.

November 5, 1999: Rodey Batiza, Building the Ocean Crust: Easy as 1, 2, 3?

October 22, 1999: Greg Moore, Deformation and Fluid Flow in Subduction Zones: Toward an Understanding of the Seismogenic Zone

October 15, 1999: Ian Skilling, Eruption of voluminous debris flows (lahars) derived from subsurface Peperite mixing: a characteristic style of "boiling-pot" volcanism Restricted to the initial stages of Karoo-Ferrar volcanism?

October 8, 1999: Klaus Keil, 50 Years of Electron Probe Microanalysis: A Historical Account of Geological Applications.

September 24, 1999: L. Neil Frazer, Why humpback whales sing.

September 17, 1999: Dapeng Zhao, Seismological Structure of the Japan Subduction Zone: Implications for Arc Magmatism and Dynamics.

August 27, 1999: Margo Edwards, Arctic Adventures.

July 23, 1999: Robert J. Stern, The IBM Arc System in The Western Pacific: A Natural Laboratory for The Subduction Factory Experiment

July 16, 1999: Andrew Gascho, A Tectonic Interpretation of the Northern Boundary of the Easter Microplate

July 2, 1999: Robert S. Detrick, Crustal Structure and Magma Focussing on the Mid-Atlantic Ridge at 35N

July 1, 1999: Hap McSween, Origin of Rocks and Soil at the Mars Pathfinder Landing Site

June 7, 1999: Sang-Mook Lee, Recent Investigations of the Seamounts and Active Arcs in the Western Pacific by KORDI

June 4, 1999: Sang-Mook Lee, Crustal Magnetization of the Reykjanes Ridge and Implications for its Along-Axis Variability and the Formation of Axial Volcanic Ridges

May 28, 1999: W. Jason Morgan, Present-Day Motion of Plates Over Hotspots

May 7, 1999: Khalil J. Spencer, Geochemical Constraints on the Sources and Transport of Metal Pollutants to the Coastal Ocean, Oahu, Hawaii

April 30, 1999: Brian N. Popp, Controls on the Carbon Isotopic Composition of Phytoplankton: Paleoceanographic Perspectives

April 23, 1999: Rebecca Carmody, The Geologic, Geochemical and Oxygen Isotopic Features of the Slaufrudalur Stock, Southeast Iceland

April 9, 1999: Aly I. El-Kadi, Modeling Aerobic Biodegradation of Residual Hydrocarbons in Tidal Aquifers

March 31, 1999: G.V. Gibbs, Model Structures and Properties of the Electron Density Distributions of Low Quartz and Coesite at Pressure

March 31, 1999: Kenji Satake, The 1998 Papua New Guinea Tsunami: Preliminary Results of Offshore Surveys

March 25, 1999: Kenji Satake, Tsunamis and Subduction-Zone Earthquakes

March 19, 1999: William W. Sager, Implications of Marine Geophysical Data for the Origin and Evolution of Shatsky Rise

March 12, 1999: H. D. Holland, The Evolution of Atmospheric Oxygen

March 5, 1999: Lionel Wilson, What Lava Fountains Can Tell Us About Eruption Conditions

February 26, 1999: Gerard Fryer, A Different Tack: Introducing Geology to Non-Majors by Considering Only the Great Controversies

February 19, 1999: Robert Yonover, New Military-Approved Rescue Technology

February 12, 1999: Janet Becker, The Interaction of Waves and Beaches: Modeling Pattern Formation in the Nearshore

February 5, 1999: Laura S. Magde, Seismic Structure and the Crustal Magma Plumbing System, MAR, 35oN

January 29, 1999: Chris Marone , The Rheology of Brittle Fault Zones: A view from the Laboratory.

January 22, 1999: Andrew Harris , Moving fumaroles and Sulfur flows on Vulcano.

January 15, 1999: Laura S. L. Kong, Imaging the Rift Axis of the Puna Ridge, Kilauea Volcano.

December 4, 1998: Eric Grossman, Comparison of ICE4G, ICE5G and the Insular Database of Middle to Late Holocene Sea-level Change in the Pacific.

December 4, 1998: Clark Sherman, A Submerged Stage 7 Terrace and Reevaluation of the Late Pleistocene Stratigraphy of Oahu, Hawai'i.

November 20, 1998: Stuart A. Weinstein, Pacific Tsunami Warning Center Operations, Challenges, and the PNG Tsunami.

November 13, 1998: Klaus Keil, The Case for Robotic Sample Return Missions to Mars: Arguments Based on the Study of Returned Lunar Samples and Meteorites from Asteroids, Moon and Mars.

November 6, 1998: Jill Karsten, Tales of the South-East Pacific: The Northern Chile Ridge Revealed

October 30, 1998: Luann Becker, Fullerenes and the Flux of Extraterrestrial Helium He@C60 to the Earth over Geologic Time

October 23, 1998: Fred Duennebier, A Tale of Two Observatories: HUGO AND H2O

October 2, 1998: Gerard Fryer, Okushiri, Five Years Later: The Geology, Geophysics, Oceanography, Coastal Engineering, and Socoology of the Earthquake and Tsunami of July 12, 1993.

Septmber 25, 1998: Lutz Nasdala, An Unusual Hydrothermal Mineralization from Saxony, Germany.

September 18, 1998: Julia K. Morgan, Exploring Geologic Procecces in a Nunmerical Sandbox: (1) Accretionary Prisms and (2) Volcanic Spreading.

August 28, 1998: Brian Taylor, Active Continental Extension in the Western Woodlark Basin, PNG: ODP Leg 180 Initial Results.