Continental Drift and Plate Boundaries PDF
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This document's content discusses theories like continental drift, seafloor spreading, and plate tectonics and delves into the evidence supporting these concepts. It also touches upon the different types of plate boundaries and their associated geological features such as mountain ranges, volcanoes, and trenches. Further, it includes questions or assignments regarding plate tectonics, highlighting its importance to life on Earth.
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CONTINENTAL DIFT THEORY SEAFLOOR SPREADING THEORY PLATES TECTONICS THEORY CONTINENTAL DRIFT THEORY EVIDENCE FOR PLATE TECTONICS 1. The continents fit along their coastlines into one supercontinent, Pangea, as Wegener's continental drift theory had predicted. SHAPE OF THE CONTINENTS ...
CONTINENTAL DIFT THEORY SEAFLOOR SPREADING THEORY PLATES TECTONICS THEORY CONTINENTAL DRIFT THEORY EVIDENCE FOR PLATE TECTONICS 1. The continents fit along their coastlines into one supercontinent, Pangea, as Wegener's continental drift theory had predicted. SHAPE OF THE CONTINENTS EVIDENCE FOR PLATE TECTONICS 2. The distribution of marker fossils across continents forms a contiguous pattern when the continents are fit together. Marker Fossils - are the remains of plants and animals that exhibit special characteristics. fossils fossils 10 EVIDENCE FOR PLATE TECTONICS 3. Geological features, such as mountain ranges, rock formations with the same ages, and rock characteristics of continents, such as North America and Europe, form a contiguous bodies when continents are fit together. ROCK TYPES (AGES) MOUNTAIN CHAINS EVIDENCE FOR PLATE TECTONICS 4. Contrasting paleoclimate indicators or deposits provide clues that continents, such as Antartica and Europe, which were once situated in the tropics are now found in arctic and temperate climate environments. The tropical deposits in them indicate that they were once situated in the tropics and had migrated to where they are now. PALEOCLIMATE- the climate of the past that characterize the area. EVIDENCE FOR PLATE TECTONICS Glacial Deposits, also called tillites, are found in South America, Africa, India and Australia or areas that are close to the equator and far from latitudes that experience glaciation. The mismatch between these deposits and the tropical or sub-tropical setting where they are found now indicate continental drifting. CLIMATE ZONES (GLACIERS) SPREADING SEAFLOOR AND PALEOMAGNETISM Computer-generated detailed topographic map of a segment of the Mid-Oceanic Ridge. "Warm" colors (yellow to red) indicate the ridge rising above the seafloor, and “Cool" colors (green to blue) represent lower elevations YOUNGEST OLDEST youngest oldest oldest x x y y mid-oceanic ridges deep-ocean trenches seamount chains fracture zones PLATE BOUNDARY PLATE TECTONICS PLATE TECTONICS PLATE BOUNDARY PLATE BOUNDARY PLATE BOUNDARY TYPES OF PLATE BOUNDARIES PLATE BOUNDARY TRANSFORM PLATE BOUNDARY PLATE BOUNDARY TRANSFORM PLATE BOUNDARIES DIVERGENT PLATE BOUNDARY DIVERGENT PLATE BOUNDARY DIVERGENT DIVERGENT BOUNDARY Results in the formation of Oceanic Crust CONVERGENT BOUNDARY CONVERGENT PLATE BOUNDARY OCEANIC-CONTINENTAL CONVERGENT BOUNDARY SUBDUCTION ZONE Ø the denser plate goes underneath Ø occurs with oceanic-oceanic, or oceanic- continental collisions OCEAN TRENCH VOLCANIC ARC (MOUNTAINS) OCEANIC-OCEANIC CONVERGENT BOUNDARY OCEANIC-OCEANIC CONVERGENT BOUNDARY ISLAND ARC CONTINENTAL-CONTINENTAL CONVERGENT BOUNDARY OROGENY FORCES ACTING ON ROCKS DEFORMATIONS ON EARTH’S CRUST FOLDING FAULT FAULT FAULT Uplift Fault block Fault block Subsidence FAULT Mountain building results from the combined forces of compression and uplift which squeeze and push a mass of rock upward. A mountain range is a chain of mountains formed along convergent plate boundary. MOUNTAIN BUILDING AND MOUNTAIN RANGE TRENCHES VOLCANOES VALLEY ASSIGNMENT:1/2 CW YP SUBMIT NEXT WEEK 1. How is plate tectonics essential to the existence of life? Explain your answer in atleast 5 sentences. 2.WHAT IS MOMENT MAGNITUDE SCALE?
