Geology_Lab4

Geography 1011 Exercise 2 Tectonic Plate Boundaries and Hawaiian Hot Spot Topographic Maps: Measuring Gradient Materials needed: Textbook, Eldorado Springs HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717", CO HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717" HYPERLINK "https://store.usgs.gov/product/487717"GeoPDF topographic map. Part 1. Tectonic Plate Boundaries. Figures 11.25 and 11.27 of your text show the 14 largest lithospheric plates, their relative motions, the different types of plate boundaries, and associated volcanic and earthquake zones. Please refer to them in answering the following questions. • Based on Figure 11.25, make a list of the lithospheric plates depicted on the map. 1)North American Plate 2) Juan De Fuca Plate 3)Caribbean Plate 4)Pacific Plate 5)Nazca Plate 6)Antarctic Plate 7)South American Plate 8)African Plate 9)Arabian Plate 10)Eurasian Plate 11)Philippine Plate 12)Caroline Plate 13)Fiji Plate 14)Indo-Australian Plate • Identify which type of plate boundary ( divergent or convergent ) occurs at each of the following locations. In the key for the textbook maps, divergent boundaries are depicted by the symbol for ‘spreading ridge offset by transform faults,’ and convergent boundaries are depicted by the symbol for ‘subduction zone,’ with arrows pointing in the direction of the subducting plate motion along the line of subduction. • Through Iceland: _____ Divergent • Between the Nazca and Pacific Plates ______ Divergent • Through the Red Sea: ______ Convergent

• Ocean floor just south of Alaska _______ Convergent • Eastern edge of Indian Ocean, next to Indonesia ________ Convergent • Indian Ocean between the Antarctic and Indo-Australian plates: ________ Divergent • Through the northern Mediterranean Sea area ________ Convergent • Identify and list at least three plates that converge near Japan. - The North American Plate - The Pacific Plate - the Eurasian Plate • Volcanoes related to plate subduction. With what subduction plate boundary is each of the following volcanic arcs or mountain belts associated? Insert the names of the two plates. For some, there may be more than one correct answer. For this question you may wish to consult an atlas or online source if you do not know the location of the volcanic chain. • Mtn. Range/ Island Arc Subducting Plate Opposing Plate Aleutian Islands: Example Pacific North American Japan Philippine Eurasian Central American Mountains: Nazca Caribbean Andes Mountains: Nazca South American Mariana Islands: Philippine Eurasian Kuril Islands: Pacific North American Philippine Islands: Philippine Eurasian Sumatra – Java: Indo-Australian Eurasian Kermadec Islands: Indo-Australian Fiji Mt. Etna and Mt. Vesuvius, Italy African Eurasian New Guinea Indo-Australian Caroline Zagros Mtns, Iran Arabian Eurasian • Volcanoes related to divergent boundaries. With which spreading boundaries are each of the following volcanic areas associated? Island(s) Plate to W or S Plate to E or N