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(1.5" x 2.0" Rock)
Shale is a clastic sedimentary rock made of mud (clay-silt).
Oil shale (bituminous shale) is a shale petroleum source rock that contains kerogen (organic
remains of small sea plants such as algae) in its pores which was changed into petroleum crude
oil by heat and pressure when deeply buried in the earth so that petroleum crude oil migrated out of
its oil shale source rock and into its oil sandstone, its oil limestone or its oil dolostone reservoir rock.
To buy five oil shales for $14.95 (U.S.) which does include shipping to the U.S., click
on this buy rocks link. For more information, click on this info@oilrocks.com email link.
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