Geology GEOL-G 130 Lecture Notes - Lecture 5: Ice Shelf, Sea Ice, Firn
Document Summary
Fossil formation: something dies or leaves tracks, bury quickly before decay, bury 1 mile deep, compress. Rock: uplift to expose it, someone needs to find it. The magic forest in the antarctica: near beardmore glacier, permian 260 million years, standing tree stumps, leaves/branches, also found in africa, south america, india, austrailia. The triassic: 237 million years, tetrapod fossils in the tam, tetrapod=4 legs, ages: triassic and jurassic, what: amphibians and reptiles, 1st amphibian: graphite peak-1967 by peter barrett found today high mountains. Environment: river floodplain: the reptiles: dinosaurs. Volcanoes of antarctic: why volcanoes matter. Hard or solid real rock on surface: lava lake. How to tell if a volcano is active: moving magma cause earthquakes, earthquakes are usually frequent but small, mount erebus is seismically active, rising magma causes the ground to expand like a balloon and tilt. Tilt of ground tells about rising magma or that it"s disappearing. Erebus: elevation: 3,794 m (12,448 ft, discovered 1841.
