Scratch and grinding marks on sedimentary rocks indicate which type of environment?

1.lake

2.alluvial

3.beach

4.glacial

its earth science online

The answer to this question is the number 4 which is glacial which is denoting a  formation of glaciers. A scratch and grinding marks on sedimentary rocks indicate a glacial type of environment. The glacial, a formation and indicates the existence of glaciers which carries different types of sediments from big rocks to fine powder.

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