GEOL 1020 Lecture Notes - Lecture 32: Sea Level Rise, Cooksonia, Baragwanathia
14 Nov 2016
School
Department
Course
Professor
Document Summary
Start of land colonization: plants, precursors to arthropods. Estuarine: being able to service when there is a change in the salt water to fresh water and in shallow water when there is high tides and low tides. Gondwanan extended from the equator to the south pole. Later in the eon, the sea levels drops. It is in the silurian that we find the first evidence of life on land. While it is possible that plants and animals first moved onto the land in the ordovician, fossils of terrestrial animal life from that period are fragmentary and difficult interpret. Silurian strata have provided likely ascomycete fossils (a group of fungi), as well as remains of the first arachnids and centipedes. Early plants: cooksonia, has usually been considered the oldest known land plant. Fossils assigned to several species are known from north america, europe, asia, and africa, and from both the.
