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Pisco formation: Difference between revisions
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The Pisco formation is a fossil site in Peru that contains some 346 well preserved whales and some other fossil animals. It has an area of 1.5-km2 and is 80-m thick. Using [[radiometric dating]] methods, the site gave an age of 10-12 million years old. It mainly consists of a sedimentary rock called diatomite. This site, which was brought to attention by [[Art Chadwick]], [[Leonard Brand]], [[Raúl Esperante]], and [[Poma]], is one of the world's best examples of a formation being created by Noah's flood. | The Pisco formation is a fossil site in Peru that contains some 346 well preserved whales and some other fossil animals. It has an area of 1.5-km2 and is 80-m thick. Using [[radiometric dating]] methods, the site gave an age of 10-12 million years old. It mainly consists of a sedimentary rock called diatomite. This site, which was brought to attention by [[Art Chadwick]], [[Leonard Brand]], [[Raúl Esperante]], and [[Poma]], is one of the world's best examples of a formation being created by Noah's flood. | ||
=== | ===Fossil preservation=== | ||
The preservation of the whale fossils is amazing. Of the hundreds of whale fossils, 145 are complete fossils. There are no signs of what one would expect from sea floor decay(wormholes, barnacle encrustations, and a utter lack of any sign of bioturbation). Brand et al point out that when a marine creature dies, scavengers quickly devour the corpse. Furthermore, the baleen of some whales, a part rarely found, is preserved. As a result, Brand et al claim that this site is clearly an example of rapid burial.[http://origins.swau.edu/who/chadwick/whales.1] | The preservation of the whale fossils is amazing. Of the hundreds of whale fossils, 145 are complete fossils. There are no signs of what one would expect from sea floor decay(wormholes, barnacle encrustations, and a utter lack of any sign of bioturbation). Brand et al point out that when a marine creature dies, scavengers quickly devour the corpse. Furthermore, the baleen of some whales, a part rarely found, is preserved. As a result, Brand et al claim that this site is clearly an example of rapid burial.[http://origins.swau.edu/who/chadwick/whales.1] | ||
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Also in support of rapid burial is the fact that the amount of whales facing up and the amount facing down are about equal. This shows a picture of a highly chaotic environment.[http://origins.swau.edu/who/chadwick/raul.pdf] | Also in support of rapid burial is the fact that the amount of whales facing up and the amount facing down are about equal. This shows a picture of a highly chaotic environment.[http://origins.swau.edu/who/chadwick/raul.pdf] | ||
===Interpretation | ===Interpretation=== | ||
Since there are signs of sharks eating away at the whale corpse, there is clear evidence that the whale were not merely deposited in preexisting diatomite. The diatomite was formed at the same time whales died. Brand et al conclude, after debunking other interpretations, that the formation is a result of a massive diatom [[bloom]].There is some evidence of volcanism and this would supply to essential nutrient to produce a diatom bloom. This in turn killed the whales because bloods poison the water. | Since there are signs of sharks eating away at the whale corpse, there is clear evidence that the whale were not merely deposited in preexisting diatomite. The diatomite was formed at the same time whales died. Brand et al conclude, after debunking other interpretations, that the formation is a result of a massive diatom [[bloom]].There is some evidence of volcanism and this would supply to essential nutrient to produce a diatom bloom. This in turn killed the whales because bloods poison the water. | ||
==Implications== | ===Implications=== | ||
The Pisco formation is a amazing site. The rapid burial of the whales and preservation of their baleen depict a story of whales perishing in a diatom bloom in the late flood period. However, there is more to be drawn from the fossil site. | The Pisco formation is a amazing site. The rapid burial of the whales and preservation of their baleen depict a story of whales perishing in a diatom bloom in the late flood period. However, there is more to be drawn from the fossil site. | ||
==Mixed environment== | |||
Though the Flood would produce a general pattern in the fossil record ,due to [[fossil sorting]] (e.g. [[]hydrological sorting] and ecological zonation), exceptions are bound to occur. Whales are not the only creatures found at the Pisco formation. The others strangely include a few [[sloths]] and some [[penguins]]. This is a clear example of creatures that live in completely different ecologies being buried at the same site. | Though the Flood would produce a general pattern in the fossil record ,due to [[fossil sorting]] (e.g. [[]hydrological sorting] and ecological zonation), exceptions are bound to occur. Whales are not the only creatures found at the Pisco formation. The others strangely include a few [[sloths]] and some [[penguins]]. This is a clear example of creatures that live in completely different ecologies being buried at the same site. | ||
