01:460:100 Lecture Notes - Lecture 2: Pleistocene, Stromatolite, Gymnosperm

• School: Rutgers University
• Department: Geological Sciences
• Course: 01:460:100
• Professor: Christopherlepre

Document Summary

4. 5 million years ago (ga) till present day. Stratigraphy is the science of understanding historical geology. Study of sequence of geological layers in time & space. Layers refer to strata & stratum (for one and many, respectively) Law of super position (layer cake rule) layers at the bottom of a sequence formed 1st and are thus older than layers that occur higher in the sequence. Biostratigraphy sequence of fossils (ancient life) in geological layers. Lithostratigraphy the character of geological layer in time/space according to composition. Chronostratigraphy numerical dates of the sequence of geological layers in time/space: chrono = time. Stratigraphic units/intervals units define a physical thing, interval defines time sub-divide geological time. Geological time scale a model or a representation of past time it is also a metric device, a tool for us to measure time. Eepe (eons eras period epochs) a hierarchy of most inclusive to most exclusive. 4 major eons (66 million years ago to present day):