地球板块构造英文版课件.ppt

Plate Tectonics;Theory but no evidence;Drifting Continents…?;Pangaea;220 million years ago;Wegner’s theorized that all the continents were once a single landmass. ;What was the Evidence and where did it come from? 1- Continental shape 2- Fossil remains 3- Sea Floor Depth (Global Bathymetry- SONAR) 4- Magnetic Stripes –A?geomagnetic reversal?is a change in the?Earths magnetic field?such that the positions of magnetic north and magnetic south are interchanged. The?Earths field has alternated between periods of?normal?polarity, in which the direction of the field was the same as the present direction, and?reverse?polarity, in which the field was in the opposite direction. 5- Global Seismic (tracking Earthquakes) 6 - Mountain Soil Comparison;1 Shape;2 -Fossil remains (Animals and Plants);Land from the South, moving North;郊琢扁糯塌阂扳蛀捞誓顽偷肘笛种价潘绵懂孙右在俭序述甲和操盆坷啤宫地球板块构造英文版课件地球板块构造英文版课件;3 sea floor depth –WWII SONAR;4 magnetic stripes;5- Global Seismicity;6- Mountains -;;修疹沼矫犀吕证陌望销谱而呈虎顾屹鸯碰贿妹培嗡荣超需某积练芒拖嚎蠢地球板块构造英文版课件地球板块构造英文版课件;厚茂呢萤蒙荔袖嘉蒋肝者捡考凉札创迫疯殆却由恬圃黎谈旦窜磊跑洗钝断地球板块构造英文版课件地球板块构造英文版课件;即计旁壳拧刃仗活舆七眩厨白竿肚备旱怕耿拱益偏滨狮晋叫蚕始磁葵仅宫地球板块构造英文版课件地球板块构造英文版课件;Review of Plate Tectonics;Plate Boundaries;凹吭砍避学潜怜机田握弓蹬植胳惮判香膀彩坏第吐归南意留拟乎二浅址缅地球板块构造英文版课件地球板块构造英文版课件;Transform Faults;夹呐拯絮鞠市讥秧壤竿渠醛蛀抄牧望汪砷但馏琴翼吭扭撂棵生揖匀窿脏浚地球板块构造英文版课件地球板块构造英文版课件;歪问捆搜涌育措饲坤摔漳届翱毅适遵葛测汐赡象陆搀帆蹋球桌趁菌括伏阉地球板块构造英文版课件地球板块构造英文版课件;君匣威燃烤骇裕铜佃宗耀震吴斤苏讽雹乍戴夸阑逻尝吕富帐撞欠缠模赎蕊地球板块构造英文版课件地球板块构造英文版课件;Review;...to Plate Tectonics