GEOL 122 Chapter Notes - Chapter 12: Neoproterozoic, Proterozoic, Stromatolite
Document Summary
Orogen- term for any body of rocks deformed by erosion (orogeny). Mitochondrion- a structure formed from two prokaryotic cells in which one lived within the other and altered it. Stromatolites- although well represented in the archean much more abundant in proterozoic rocks, due to the increase in size of continents the grew in diversity attaining their greatest diversity about 1. 2 billion years ago. Chloroplast- it is widely agreed that plantlike protists evolved as a result of a protozoan cell consuming a cyanobacterial cell, this intracellular body is known as a chloroplast. *animals probably originated during neoproterozoic time and diversified spectacularly during the last 30 million years of this era. *the most ancient animal-like unicellular organisms discovered are about 750 million years old. *the oldest multicellular fossils are found in chinese rocks dating back 580 million years preserved by the precipitation of phosphate minerals.
