![]() ![]() ![]() ![]() Is outstanding,but what is even more impressive is the Specimens of marine reptiles,fish,and invertebrates haveīeen recovered from these rocks.The quality of preservation Intererting case for analysis.The ichthyosaur remains areįound in black,bituminous marine shales deposited aboutġ90 million years ago.Over the years,thousands of (10) The deposits at Holzmaden,Germany,present an Treasury of well-preserved ichthyosaur fossil. ![]() Rapid burial.Given these factors,some areas have become a Little scavenging by other animals,a lack if swift currentsĪnd waves to jumble and carry away small bones,and fairly, Required a suite of factor:a slow rate of decay of soft tissues, (5) creatures because,as marine animals,they tended to live inĮnvironments less subject to erosion.Still,their fossilization Line higher chance of being preserved than did terrestrial Weathering before they can be fossilized.Ichthyosaurs had a Occurrence in the fossil record.The tiny,delicate skeletonsĪre usually scattered by scavengers or destroyed by The preservation of embryos and juveniles is rare ![]()
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