GEOL 101 Lecture Notes - Lecture 1: Plate Tectonics, Cyanobacteria
18 Oct 2016
School
Department
Course
Professor
Document Summary
Geology: the study of, geologic time is cataloged in a geologic time scale. Era - subdivision of an eon: period - subdivision of an era. Earth is 4. 56 billion years old: unique temperature that allow liquid water the interior rocks of the earth still retain ions that if brought to the surface could be water vapor (potential water that could be released) Not a greenhouse planet because the sun"s radiation was not as strong as it is now the core dominates the earth"s magnetic field which acts as a protective zone from iron. Newly formed earth formation of the core. Ancient earth: first billion years lots of volcanic activity (create a atmosphere) liquid water. Early appearance of life - at least 3. 8 billion years ago: 3. 5-1. 0 b. y. Cyanobacteria (look up: were so common that they released enough oxygen to create our. Plate tectonic processes were likely occurring in some way or another breathable atmosphere: last billion years.
