Mauna Loa: onshore-offshore slope maps


provided by William Chadwick. These maps are from the paper

Moore, J.G., and W.W. Chadwick, Jr., 1995, Offshore Geology of Mauna Loa and Adjacent Areas, Hawaii, in Rhodes, J.M. and J.P. Lockwood (eds.), Mauna Loa Revealed: Structure, Composition, History, and Hazards, American Geophysical Union, Washington, D.C., pp. 21-44.


Southern Big Island Figure 3 of Moore and Chadwick [1995].

This is a slope map of the south Hawaii region, in which dark areas are steepest slopes and light areas are gentlest slopes. (Note that this is fundamentally different than a shaded-relief map, in which topography is artificially illuminated from a specific direction and angle). The coastline is shown by solid black line. This image was derived from 200-m gridded data. (Area is 18.5 to 20.0 in latitude and -156.8 to -154.1 in longitude). [Image size: 158621 bytes]


Puna Rift Figure 8 of Moore and Chadwick [1995].

Slope map of the east cape of the Island of Hawaii where the east rift zone of Kilauea volcano crosses the shoreline (the horseshoe-shaped subaerial cone is Kapoho Cone). Steeper slopes are darker, and data are gridded at 100-m spacing. Note the striking textural contrast between smooth fragmental quenched basalt draping the offshore part of the flank downslope from subaerial vents on rift zone, with the irregular lobate subaqueous lava draping the flank downslope from submarine vents on rift zone. (Area is 19.20 to 19.65 in latitude and -155.00 to -154.55 in longitude). [Image size: 56455 bytes]


Kilauea South Flank Figure 9 of Moore and Chadwick [1995].

Slope map of central Kilauea volcano and its submarine south flank. Steeper slopes are darker, and data are gridded at 100-m spacing. This area includes the offshore extension of Kilauea's southwest rift zone, landslide terrane from both Mauna Loa and Kilauea, and Loihi seamount. (Area is 18.75 to 19.45 in latitude and -155.60 to -155.00 in longitude). [Image size: 106836 bytes]


Alika 2 slide Figure 10 of Moore and Chadwick [1995].

Slope map of the distal apron of the Alika 2 landslide (which originated from near the coastline of the central western slope of Mauna Loa), as shown in the northwest part of Figure 3. Steeper slopes are darker, and data are gridded at 100-m spacing. Note well-defined levees in the southern half of the figure where the landslide was channelized, which give way to a broad hummock field in the western part of the figure where the landslide debris was able to spread out radially. (Area is 19.40 to 19.95 in latitude and -156.65 to -156.00 in longitude). [Image size: 95728 bytes]


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