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本文论述了该区在晚更新世末次冰期中的间冰段时期(距今50000—25000年)为浅海沉环境,后转变为冰融水环境,在31000—11000年时,本海积平原被冰川覆盖,末次冰期以后(距今6600—3500年),该区冰盖退缩形成湖泊与泻湖,出现三次“似浊流”与两次冰融水相交替沉积,在2800年新冰期时,本区冰盖前进,形成以普通角闪石为主,次为石榴石与磁铁矿的巨砾夹粗砂的三道冰碛垄,在此时段片理化阳起石、苏长岩的基岩上发育了硅铝-氯化物碎屑型风化壳。除寒冻物理风化作用外,化学风化作用也十分明显。
This paper discusses that during the interglacial period of Late Pleistocene (50000-25000 years ago) during the last Pleistocene, it was shallow-sea-sinking environment and then changed to ice-melting environment. From 31000 to 11000 years, After the last glacial period (dating back to 6600 to 3500 years ago), the ice sheet of the area collapsed to form lakes and lagoons. Three “turbidity-like flows” and alternating deposition of ice and melt water appeared. During the new ice age of 2800 years, District ice cover forward to form a common amphibole-based, followed by garnet and magnetite grit gravel sand moraine ridge of three, during this period of chemical Yang Yang, the bedrock of the Soviet rock developed Silicon aluminum - chloride clastic weathering shell. In addition to freezing physical weathering, chemical weathering is also very obvious.