Please enable JavaScript.
Coggle requires JavaScript to display documents.
Geologic time - Coggle Diagram
Geologic time
Paleozoic era
-
Devonian period
-
-
-
Mass extinction: placoderms, many corals and trilobites
-
Ordovician period
-
Mass extinction: many corals and several brachiopods, a hard-shell marine invertebrate died.
-
First trilobites, branchiopods, ectropocts, mollusks, corals and echoniderms.
-
-
-
-
-
-