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1977—1980年在板块构造研究中较重要的新进展有以下几方面:一、板块边界进一步确定和次级板块的划分据新的地震资料及卫星影象所提供的现代构造活动等资料,勾绘出北美板块与欧亚板块边界自冰岛,经北冰洋盆地及拉普帖夫海,于勒拿河三角洲登陆,穿过亚洲大陆东北角至鄂霍次克海。以后分为两支,北支经堪察加与阿留申-阿拉斯加边界相连。南支沿鄂霍次克海西海岸南下,经萨哈林与千岛-日本海沟边界
From 1977 to 1980, more important new advances in plate tectonics are as follows: I. Further Determine of Plate Boundary and Division of Secondary Plate According to the new seismic data and the information of modern tectonic activities provided by satellite images, The boundary between the North America Plate and the Eurasian Plate is plotted from Iceland. After its passage through the Arctic Ocean basin and the Laputiyev Sea, it landed in the Yulena River delta and across the northeast corner of the Asian continent to the Sea of Okhotsk. Later divided into two branches, the northern branch of Kamchatka and Aleutian - Alaska border connected. South branch along the Sea of Okhotsk west coast south, the Sakhalin and Thousand Island - Japan trench boundary