Size-dependence in the shape of fresh impact craters on the moon
Size-dependence in the shape of fresh impact craters on the moon
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发表时间：
1977
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通讯作者：
R. J. Pike
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作者：
R. J. Pike
从小的简单的陨石坑到大型的复杂或改装的陨石坑的转变的特点是新鲜的月球陨石坑的形状发生了11次变化，这些变化发生在直径为10至30公里的范围内。本文根据新的Apollo数据，定义了新出现的陨石坑的7个比率水平变化--轮缘顶径随深度、轮缘高度、侧面宽度、轮缘墙坡度、底径、圆度和轮缘顶顶平整度的变化，并在可行的情况下用数学表示。这些关系构成了解释月球上新陨石坑的形状模型。这种大小相关的变化反映了中央山峰、边缘梯田和直径10至20公里的陨石坑内的平地的出现。
The transition from small simple craters to large complex or modified craters is characterized by eleven changes in the shape of fresh lunar craters which occur within a diameter range of 10 to 30 km. In the present paper, seven ratio-level variations - those of rim-crest diameter with depth, rim height, flank width, rimwall slope, floor diameter, circularity, and rim-crest evenness - are defined for fresh-appearing craters from the new Apollo data and are expressed mathematically where practicable. These relations constitute a shape model for interpreting fresh craters on the moon. The size dependent changes reflect the occurrence of central peaks, rimwall terraces, and a flat floor within craters measuring 10 to 20 km in diameter.