Presentation on theme: "Earth Adventure. Mountains From the Sea… Early in this century an extraordinary fossil discovery was made high in the Canadian Rockies. A geologists’"— Presentation transcript:
Mountains From the Sea… Early in this century an extraordinary fossil discovery was made high in the Canadian Rockies. A geologists’ packhorse stepped on a loose piece of black shale and turned it over. Embedded there underneath were the fossilized remains of creatures from the sea.
Mountains From the Sea… Some scientists reasoned they were leftovers from a time when the seas were much higher… Others asserted that the fossils were “stacked” in layers of sediment deposits that correspond to earlier and earlier time periods… What do you think?
Mountains From the Sea… Go to chapter 9 and write a short answer to the challenge of the fossils based on evidence you see in the text. Please include two pictures showing how mountains may come from the sea.
Mountains From the Sea… These pictures reflect the intense pressure exerted by the heat flow from the nuclear reactions of the core can shape the earth in two ways…. Continental Drift and Internal heat and pressure…
Continental Drift The theory that the crust of the earth is floating on a molten, magnetic fluid of rock and metals (basically HOT LAVA!) One of the potential tragedies of continental drift.
Continental Drift Maybe this link from the Exploratorium in San Francisco will help explain… Pangaea
Internal Heat and Pressure Radioactive substances are the primary source of heating in the core. Molten rock is like wax…it is a fluid when hot and very brittle when cool… Following this reasoning, why does the surface of the earth change so much?
Internal Heat and Pressure
Volcano Which factor creates this type of change in the crust?
Mountains From the Sea… The effects of erosion contribute to the layers of sediment that trap organisms
Mountains From the Sea… How do the two factors of CONTINENTAL DRIFT AND INTERNAL PRESSURE from the super-heated core force the crust to change and deform?