First Fossil Record at Darcy Poninski blog

First Fossil Record. Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. The fossil record provides snapshots. The first vertebrates, animals with backbones, appeared about 400 million years ago; Archicebus, one of the earliest primates to appear in the fossil record, lives at this time. Nicholas steno’s anatomical drawing of an extant shark (left) and a fossil shark tooth (right). The first mammals, less than 200 million years. In a few cases the original substance of the hard parts of the organism is preserved, but more often the original components have been replaced by minerals deposited from water seeping.

Nature of the Fossil Record Digital Atlas of Ancient Life
from www.digitalatlasofancientlife.org

In a few cases the original substance of the hard parts of the organism is preserved, but more often the original components have been replaced by minerals deposited from water seeping. The fossil record provides snapshots. Nicholas steno’s anatomical drawing of an extant shark (left) and a fossil shark tooth (right). The first vertebrates, animals with backbones, appeared about 400 million years ago; Archicebus, one of the earliest primates to appear in the fossil record, lives at this time. Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. The first mammals, less than 200 million years.

Nature of the Fossil Record Digital Atlas of Ancient Life

First Fossil Record In a few cases the original substance of the hard parts of the organism is preserved, but more often the original components have been replaced by minerals deposited from water seeping. Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. Nicholas steno’s anatomical drawing of an extant shark (left) and a fossil shark tooth (right). The first mammals, less than 200 million years. The fossil record provides snapshots. Archicebus, one of the earliest primates to appear in the fossil record, lives at this time. In a few cases the original substance of the hard parts of the organism is preserved, but more often the original components have been replaced by minerals deposited from water seeping. The first vertebrates, animals with backbones, appeared about 400 million years ago;

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