冰川运动论文英语.pdf

Polly Cao Professor William Peck FSEM 117 Oct 17, 2014 GeologyPaperFour...GlacialandCoastalGeology I.Introduction: TheChimneyBluffstateparkandHamiltonareaarebothlocatedinupstate New York. The Chimney Bluff State park lies near Lake Ontario. It is characterized with chimney.shaped bluffs, vertical cliffs and thousands of drumlinslying onthebanks. Rocksherealsoshowcertainpatterns (basedonif theyaresoringandlayering,andtheirgrain.sizes).TheHamiltonareaconsistsof numerousmountainsthathaveU.shapedvalleys,scatteredrocksandterrace.All thosegeologicalfeaturesindicatethat thosetwoplaceplaceswere significantly affected by past glaciation, and furthermore, they are shaped by other actions suchaswatererosionanddepositionaftertheglacierhadgone. II.Methods: In each of the locations, observations were made on the valley’s shape, erosionsituation,layeringandotherdistinctivefeatures. Sketchesweredrawn to record and simplify the characteristics. Rock sizes and types in different places were measured and recorded in order to more get more detailed informationaboutthesortingandlocating. Thepreviousdataandsketchesthatwere collectedandmadecouldn’tshow the whole picture of the geological locality. As a result, other tools should be used to supplement. Using Google Earth and topo map, we were able to get informationabouttheheightandtrendofthebluff,andgeneralgeomorphology (U.shaped valleys, hanging valleys, recessional moraine, kettle lakes, and the outwashplains)ofeachplace. III.Results: 1.ChimneyBluffsStatePark: A.BeachArea: Thisbeachisfilled with pebbles.Distinctivesortingcanbeobservedasthe sizesoftherocksaremostlyuniforminoneplaceandgraduallychangefromone placetoanother.Theedgesofthestonesarerounded;mostofthestonesareflat and round. Most of the rocks are limestone and sandstone. Sandbar can be observed.Also,thedistinctionbetweenthebeachface ...t