Don't Panic Geocast

This week we discuss the geologic time scale, meteorites, and fitness trackers! Pittsburgh Fireball Feb. 17, 2015 Video of meteor Article with details of entry Animation from meteor’s perspective NASA Fireball Network Geologic Time-it’s really big (and deep) The geologic time scale Despite all kinds of fun things to demo how vast it is…still hard to understand Cosmic Calendar Pneumonic devices for timescale-and why do we need to know it? (several examples) We make all kinds of assumptions about rocks that span millions of years, but an outcrop can change over the course of just a few years/ten years Example of things changing in days to hours Time’s Arrow, Time’s Cycle How do we begin to define Geologic time? International Commission on Stratigraphy: “ International Geologic Time Scale; thus setting global standards for the fundamental scale for expressing the history of the Earth” We have to have a baseline so that we can all talk about the “same” rocks across the world Age-dating rocks Many technique