Igneous and Sedimentary Rocks, Minerals and Ores

Some Recent Questions/Requests of this service:

SEDIMENTS/EROSION

• What are the causes and effects of beach erosion?
• As discharge increases, does bed load increase?
• Can limestone become a liquid (molten) and if so, at what temperature does it reach such a state?
• Can you please give me some information on the La Brea Tar Pits and some interesting or unusual facts on fossils (found there)
• How many million years will it be before erosion causes the last peak on Maui to sink beneath the ocean waves and where will the island be located at that time as a result of the movement of the earth's plates?
• How would an area get from mudstone to limestone to shale

• Are there black sand beaches on the island of Oahu?
• What is a metallic sediment? and what is a "swash zone"?
• Is there any way to determine whether there are more grains of sand on Earth than there are stars in the sky?
• I read somewhere that the sands of the beaches of the earth are made always (mostly) of quartz. Is this true and if so why?

• Where does clay come from? How can I identify clay in soil? How does one purify it for use? I would like to take a group of young children looking for clay.Then I would like to clean it and use it. Is this possible?
• What is rock salt? how is it formed? where does it form? what is it used for? why is it important?
• Could you give me some more information about lignite and bitiminous?
• I'm looking for information on Quartz crystals (such) as in rocks.
• What reconnaissance techniques are used by diamond mining firms to successfully search for productuve kimberlite pipes? And after discovery what techniques are used to exploit the deposits? Could you provide references, and/or sources of information?
• How are Bismuth minerals formed geologically and how does Bismuth formation relates to plate tectonics; Who discovered Bismuth?

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