Four Geological Eras Essay

The history of the Earth is categorized into four different geological time eras beginning with, the Precambrian Time (4. 6 billion-544 million years ago), the Paleozoic Era (544-248 million years ago), the Mesozoic Era (248-65 million years ago), and the Cenozoic Era (65 million years ago to the present). Eras are broken down further into … Read more


Notes on the lithosphere- (rock sphere) Upper most part is crust of earth. Compiled of rocks of outer crust. Outermost shell. Upper part- rocks we see at and near the earths surface. Crust is 5 to 10 km thick under most oceans and 24 to 60 km thick under the continents. The lithosphere under the … Read more

Field Guide to Geology

A 6 page book report on “The Field Guide to Geology” by David Lambert. Lambert is known for his clear and unique style of cataloging information so that laymen can readily understand the subject. This book is no exception to that rule. It is a very clear and concise introduction to the world of geology, … Read more