You are watching: Plate tectonic boundaries were first identified by ________.
When Alfred Wegener came up through his continent drift theory in the early 1900s, he supplied several present of proof to assistance his idea. He likewise proposed that 200 million years ago, every continents were with each other in a solitary supercontinent referred to as Pangea. In this exercise, you will usage the to the right of the continents and also matching fossil evidence to piece together Pangea. This exercise is adjusted from “This Dynamic Planet” by the USGS.Individually or together a group, piece together the supercontinent Pangea.Label the landmasses of every continent in number 1.2.Color the fossil areas to complement the legend below.Cut out each of the continents follow me the edge of the continental shelf (the outermost dark line).Try come logically item the continents together so the they form a huge supercontinent.When you space satisfied with the right of the continents, talk about the evidence with her classmates and decide if the proof is compelling or not. Define your decision and also reasoning top top the evidence.Pangea began to rest apart about 200 Ma leading to the formation of the Atlantic Ocean. Utilizing the map in figure 1.3, calculate the spreading price of the Mid-Atlantic Ridge in mm/yr. (Hint: measure up the distance from the easternmost guideline of south America come the inside curve of western Africa).____________________
|The continents are surrounded through the continental shelf (stippled pattern), which extends past the continent till there is a big change in slope.|
|By around 300 million year ago, a unique ar of plants had actually evolved, well-known as the europe ora. Fossils of this plants are uncovered in Europe and other areas. Color the areas with this fossils yellow.|
|Fossils of the fern Glossopteris have actually been found in this locations. Color the areas with this fossils green.|
|Fossil continues to be of the half-meter-long fresh or brackish water (reptile) Mesosaurus. Mesosaurs thrived in the early Mesozoic Era, about 240 million year ago. Mesosaurs had limbs for swimming however could additionally walk ~ above land. Various other fossil evidence uncovered in rocks along with Mesosaurs indicates that they stayed in lakes and seaside bays or estuaries. Shade the areas with these fossils blue.|
|Fossil continues to be of Cynognathus, a floor reptile around 3 meters long that lived during the early on Mesozoic Era about 230 million years ago. It was a weak swimmer. Shade the areas with these fossils orange.|
|Fossil proof of the beforehand Mesozoic, land-dwelling reptile Lystrosaurus. Lock reproduced by laying eggs on land. Also, your anatomy argues that these animals were probably really poor swimmers. Shade the locations with this fossils brown.|
Each kind of plate boundary has unique earthquake and volcanic patterns. Using observational and critical thinking skills, prize the following questions:Observe the patterns amongst the earthquake and also volcano location maps (Figures 1.4-1.5). Hypothesize whereby you think the major plate boundaries exist and draw those limits on the blank map in number 1.6 using three various colors to recognize the kind of movement for each border (example: red because that divergent boundaries, blue because that convergent boundaries, and also green for transform boundaries).Which form of boundary (divergent, convergent, or transform) is the many abundant? ______________________________________On the exact same map whereby you attracted in plate borders (Figure 1.6), recognize locations wherein each form of these borders are located:Continent-Continent Convergence (CCC)Ocean-Ocean Convergence (OOC)Continent-Ocean Convergence (COC)Continent-Continent divergence (CCD)Ocean-Ocean divergence (OOD)Continent-Continent change (CCT)What type of plate boundary is associated with many of the deep earthquakes?______________________Describe the pattern in earthquake depth indigenous the coastline to inland in ~ subduction zones.
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