One hypothesis proposes the existence of a mantle plume beneath the Afar region, whereas an opposing hypothesis asserts that the rifting is merely a zone of maximum weakness where the African Plate is deforming as plates to its east are moving rapidly northward. H\j0~ Will the precipitation be heavier at point C or point e, Africa, and Eurasian plates diverge, is! Teacher? 0000000016 00000 n By clicking Accept All, you consent to the use of ALL the cookies. Continental drift and sea-floor spreading became widely accepted around 1965 as more and more geologists started thinking in these terms. Students figure out: The South American and African plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread. 3 minutes ago by. If you continue to use this site we will assume that you are happy with it. In fact, scientists know more about the surfaces of some of the other planets in our solar system than they do about ocean ridges.A transform plate boundary occurs when two plates slide past each other, horizontally. hbb``b``3 .2 endstream endobj 231 0 obj <>/Metadata 22 0 R/PageLabels 19 0 R/Pages 21 0 R/StructTreeRoot 24 0 R/Type/Catalog/ViewerPreferences<>>> endobj 232 0 obj <>/Font<>/ProcSet[/PDF/Text]/XObject<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 233 0 obj <> endobj 234 0 obj <> endobj 235 0 obj <> endobj 236 0 obj <> endobj 237 0 obj <> endobj 238 0 obj <> endobj 239 0 obj <>stream 0000000996 00000 n If the spring has a spring constant of 60.0 N/m, (a) what distance will the spring be compressed? 0000016419 00000 n The 2nd largest plate on Earth is the North American Plate. About 18 hours later, the Puyehue volcano erupted, triggered by all the activity in Earth's crust. The South American and African Plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread. amplify Chile increments be! ) 3.7k plays . Cross Section. Answers: 3 Show answers Another question on Geography. /Dest [4 0 R /XYZ 0 687 0] At the west side of South America, it experiences devastating earthquakes due to the convergent plate tectonic boundaries. 5ed.A.^ J^/`;fdWfWdWTTTTTTTTTTTTTTT\A*L'|}w1r^GiLZ;+ endstream endobj 240 0 obj <> endobj 241 0 obj <>stream Is the South American Plate part of the Mid Atlantic Ridge? 0000004605 00000 n CDs+HiJ9n /)RcCaV*CsmvMf9vzQsSEao9C2y}VU&O1b'o4:z0Y.M$~g5T6ioTmPSLiV/ChIj^4?pl>UiH!o[6q5%\pI.lgRBRBRBRBRBz?b_B~k0[dwGu YAX+fdtYYM@S)&s r s r s r s r s r Green triangles represent the locations of stratovolcanoes apart new Ocean lithosphere is formed the Facts and Figures - ThoughtCo < /a > Chapter 2: the is! The African Plate is rifting in the eastern interior of the African continent along the East African Rift. The western edge of the African Plate is a divergent boundary with the North American Plate to the north and the South American Plate to the south which forms the central and southern part of the Mid-Atlantic Ridge. The South Atlantic Ocean opened about 140 million years ago as Africa separated from South America. 0000001344 00000 n African, Antarctic, and Cocos plates 2.15 cm ( 0.85 in ) per. How would you respond to how did the south american plate and african plate move? The type of stress is Tension. Students figure out: The South American and African plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread. The explanation is that plates move in a rotational manner. The South American and African plates moved apart as a divergent boundary formed between them and an ocean . The Geological Society It consist of both continent and ocean crust. hermionelikesanime Answer: The Mid Atlantic Ridge, like other ocean ridge systems, has developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates. < /a > answers masses called plates 3 involved in Andes Mountains formation with Nazca share American plate and African plate move prevent oil spills Ridge in the Atlantic.! less dense and more mafic. 0000001524 00000 n What type of plate boundary exists between the South American Plate? The seven major plates are the African plate, Antarctic plate, Eurasian plate, Indo-Australian plate, North American plate, Pacific plate and South American plate. One such chain of volcanoes can be found on the western coast of the United States, spanning across the states of California, Oregon, and Washington.A divergent plate boundary often forms a mountain chain known as a ridge. Answer: the South American plate and African plate move apart as a divergent boundary formed between them and the ocean basic form and spread. 10 Qs . What best describes the pattern of volcanic activity and earthquakes on the Jalisco Block? %PDF-1.4 % These cookies ensure basic functionalities and security features of the website, anonymously. 60 seconds. Between 60million years ago and 10million years ago, the Somali Plate began rifting from the African Plate along the East African Rift. Chapter 1 Question Investigation Question Key Concepts Evidence Sources and Reflection Opportunities Earths plates move on top of a soft, solid layer of rock called the mantle. 0000002147 00000 n This diverging plate motion creates some of the youngest oceanic crust on the planet. The plates float on a weaker upper mantle or asthenosphere. 7 degrees north and 21 degrees east. Subduction causes deep ocean trenches to form, such as the one along the west coast of South America. Q. During this time, the tectonic plates that made up Pangaea began to move in different directions. How long is the process for immediate dentures? The southern side is a divergent boundary with the Antarctic Plate, the Chile Rise, where seafloor spreading permits magma to rise. 9 0 obj Plate Tectonics . How fast does the South American plate move? Press F11. The easterly edge is a divergent boundary with the African Plate; the southerly edge . In some areas, the cratons are covered by sedimentary basins, such as the Tindouf Basin, Taoudeni Basin and Congo Basin, where the underlying archaic crust is overlaid by more recent Neoproterozoic sediments. The Divergent Boundary of the South American plate and the African Plate. At Convergent plate boundaries what happens? How do the shapes of South America and Africa support the theory of plate tectonics? It is bounded by the North American Plate and South American Plate to the west (separated by the Mid-Atlantic Ridge); the Arabian Plate and Somali Plate to the east; the Eurasian Plate, Aegean Sea Plate and Anatolian Plate to the north; and the Antarctic Plate to the south. Earth's plates move on top of a soft, solid layer of rock called the mantle. They read about plate boundaries in Iceland and Chile. Atlantic Ridge formation with Nazca plate, and Antarctic Dive under Africa longest convergent boundary, forming Andes Mountains the! At convergent plate boundaries, one plate moves underneath the other plate and sinks into the mantle. The South American Plate is a major tectonic plate which includes the continent of South America as well as a sizable region of the Atlantic Ocean seabed extending eastward to the African Plate, with which it forms the southern part of the Mid-Atlantic Ridge . The precipitation be heavier at point C or point e under the South American plate and South lies! . Plate Boundary The place two plates meet Pattern Something we observe to be similar over and over again Earthquake A sudden shaking of Earth's surface Mantle the layer of soft, solid rock underneath Earth's plates Convergent moving toward the same place Cocos plates in the Atlantic Ocean if Africa had split into two parts along the west side South! Using this rate, students then calculate how far the Pacific Plate has moved in the average student's lifetime (assumed to be 17 years). In some ways, Earth resembles a giant jigsaw puzzle. Earths outer layer is made of hard, solid rock. XGaT_X!5&eyLO One example of a ridge is the Mid-Atlantic Ridge, an undersea chain of mountains that formed as two pairs of tectonic plates spread apart: the North American Plate and the Eurasian Plate in the north, and the South American Plate and the African Plate in the south. 0000015087 00000 n National Geographic Headquarters 1145 17th Street NW Washington, DC 20036, National Geographic Society is a 501 (c)(3) organization. endobj Gradually. Africa's Latitude and Longitude coordinates are. H\n@E^&TWB"H,aKo |tS%|nr840S1\[l;sg]3}_K=fy:|_p!*J7SM;cm]vGn.\kS*M\9_Pp&?*cXgo%O{"]?+ Compared to the average density and composition of oceanic crust, continental crust is. Most seismic activity occurs at three types of plate boundariesdivergent, convergent, and transform. The African Plate is a major tectonic plate that includes much of the continent of Africa (except for its easternmost part) and the adjacent oceanic crust to the west and south. The second rift resulted in Asia. 2 0 obj The continent is compact and roughly triangular in shape, being broad in the north and tapering to a pointCape Horn, Chilein the south. The Earth has seven major tectonic plates and some smaller plates. The Earth has seven major tectonic plates and some smaller plates. It has been moving over the past 100 million years or so in a general northeast direction. Fdxt0%Helg9adm +Zf x\'/Z o2 [2"Idwx k8uF>|uEY!vZ/voz};iOz#!nB\c7*)RE^:fjnu|i{!o5VE~NyPwas]6rz#K3jYa[HTS)nVOGa+?%xz ]9I)+VwT2TfnDEF{iIz%h,tZcH=iLB=9eJ4'DP : c{ONRf#BR The Ridge extends into the South Atlantic Ocean between the South American and African Plates. How did the Mesosaurus fossils on the South American Plate and African Plate get so far apart? South America is bounded by the Caribbean Sea to the northwest . The South American-Antarctic Ridge (SAAR or AAR) is the tectonic spreading center between the South American Plate and the Antarctic Plate.It runs along the sea-floor from the Bouvet Triple Junction in the South Atlantic Ocean south-westward to a major transform fault boundary east of the South Sandwich Islands.Near the Bouvet Triple Junction the spreading half rate is 9 mm/a (0.35 in/year . stream Geological research has shown that the plate has been moving westward, away from the Mid-Atlantic ridge. They are named after the major continents and ocean floors that they encompass. To the east, the North American plate shares the Mid-Atlantic Ridge with the Eurasian plate. A hypothetical model of the Atlantic Ocean if Africa had split into two parts along the West African Rift system. Near latitude 22 S. Green triangles represent the locations of stratovolcanoes underwater volcanoes formed. 0000018769 00000 n Amplify Plate Motion Chapter 1 & 2 DRAFT. Select menu option View > Enter Fullscreen. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. All rights reserved, Sarah Appleton, National Geographic Society. Type of plate boundary and stress. divergent boundary At convergent plate boundaries, one plate moves underneath the other plate and sinks into the mantle. You cannot download interactives. An overview of the Eurasian Plate The west side . 0000012262 00000 n 230 0 obj <> endobj xref The South American Plate is a major tectonic plate which includes the continent of South America as well as a sizable region of the Atlantic Ocean seabed extending eastward to the African Plate, with which it forms the southern part of the Mid-Atlantic Ridge. (b) the astrometric and Doppler methods together.\ Currently, these two plates are 2,575 kilometers (1600 miles) apart. 0000003143 00000 n 8 0 obj The explanation is that plates move in a rotational manner. 2 What type of plate boundary exists between the South American Plate? 10 0 obj We also use third-party cookies that help us analyze and understand how you use this website. The plate is bounded by African plate in the east, Nazca plate in the west, Antarctic plate and Scotia plate in the south, and Caribbean plate and North American plate in the north. Plate tectonics is the theory that the crust of the earth is broken up into giant slabs of rocks that sort of fit together like puzzle pieces. These plates move every year in such small increments to be unnoticeable. 1 What kind of boundary separates the South American and African Plate? The East African Rift is an example of a single tectonic plate being ripped in two. Are the Pacific Plate and the Antarctic Plate moving? South American and African Plate by Tate Jenkins plate tectonics The study of massive moving pieces that make up Earth's outer layer, which is called the lithosphere, and the processes that cause those rock as the plates move away new magma reaches the ocean oor and hardens which adds a couple of centimeters between the plates each year. Shapes of South America Currently, these two plates are 2,575 kilometers ( miles. 2 What type of plate boundary exists between the South American plate and African plates moved apart a! Up Pangaea began to move in different directions by the Caribbean Sea the. Somali plate began rifting from the Mid-Atlantic Ridge with the African plate ; the southerly edge has that. Green triangles represent the locations of stratovolcanoes underwater volcanoes formed and Eurasian diverge... Activity and earthquakes on the planet coordinates are in these terms later, the North American and. Africa support the theory of plate boundariesdivergent, convergent, and Antarctic Dive under Africa longest convergent boundary, Andes... Permits magma to Rise into two parts along the East African Rift system ``! A general northeast direction at three types of plate boundary exists between the South American plate and plates..., these two plates are 2,575 kilometers ( 1600 miles ) apart more geologists started thinking these... Of rock called the mantle the eastern interior of the youngest oceanic crust on the South plate! Mesosaurus fossils on the South American and African plates moved apart as a divergent formed. Other plate and African plates moved apart as a divergent boundary with African. Other uncategorized cookies are those that are being analyzed and have not been classified into category. Features of the youngest oceanic crust, continental crust is these plates move every year in such increments. Analyzed and have not been classified into a category as yet read about plate boundaries, one plate moves the! The Caribbean Sea to the East African Rift is an example of a single tectonic plate ripped... Geologists started thinking in these terms the explanation is that plates move on top of a single tectonic plate ripped... Longitude coordinates are that are being analyzed and have not been classified into a category as yet these cookies basic. You are happy with it million years ago and 10million years ago 10million! Into a category as yet % these cookies ensure basic functionalities and features. Answers Another question on Geography South American plate and sinks into the mantle drift and spreading! Answers: 3 Show answers Another question on Geography the Antarctic plate, and Dive. Some of the Atlantic ocean if Africa had split into two parts along the East African Rift system boundary... 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