4599997993B.C.-569997993B.C.
2007-02-01 06:40:57 · 4 answers · asked by jeremykostelecky12 1 in Science & Mathematics ➔ Earth Sciences & Geology
Stromatolites! Algal mats, trace fossils of worm like creatures, the Ediacaran fossils, and undoubtedly the diversification of animal forms in soft tissues which weren't recorded in the fossil record until (it's hypothesized) hard parts developed in the Cambrian. In the Cambrian, basically all of the major phyla extant today show up in the fossil record. They were probably there but just not being rpeserved due to soft tissue make up during the PC.
There are actually some neat fossils in the PreCambrian, but stromatolites from cyanobacteria are the most common ones I've seen.
2007-02-01 09:50:29 · answer #1 · answered by kiddo 4 · 0⤊ 0⤋
There is a remarkable collection of pre-Cambrian fossils called the Ediacaran fossils that have many forms that became extinct. The organisms that developed in the Cambrian explosion came from very few of the Ediacaran lines.
2007-02-01 08:56:01 · answer #2 · answered by tentofield 7 · 1⤊ 0⤋
It is marked by a very poor fossil record since organisms in this period were mainly composed of soft tissue/cells.
2007-02-01 06:45:26 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋
Being the periodr just prior to the cambian period. mostly plants and simple swimming fishes and animals like jelly doughnut fish
2007-02-01 06:47:08 · answer #4 · answered by Anonymous · 1⤊ 1⤋