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EnglandGeologyQuick questions
Rock-forming processes
Quick questions on Sedimentary rocks and depositional environments: clastic and chemical rocks, sedimentary structures, environments and lithification - Eduqas A-Level Geology
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is clastic rocks, classified by grain size?Show answer
Clastic rocks are made of fragments (clasts) of pre-existing rock, transported, deposited and lithified, and are named by grain size:
What are depositional environments?Show answer
The combination of rock type and structures fixes the environment:
What is q1?Show answer
Name the three textural varieties of sandstone defined by composition, stating which is the most mature. [3 marks]
What is q2?Show answer
Explain how graded bedding can be used both to identify the environment and to determine the way up. [3 marks]
What is q3?Show answer
Name the two processes of lithification and state what each does to a loose sand. [2 marks]
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