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WalesGeologyQuick questions
G1: Rock Forming Processes
Quick questions on Sedimentary rock forming processes - WJEC A-Level Geology
6short 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 the three classes of sedimentary rock?Show answer
Sedimentary rocks form in three ways, by origin of the particles:
What is diagenesis?Show answer
Diagenesis is the set of low-temperature changes that act on sediment after deposition and during burial, including lithification.
What is sedimentary structures as evidence?Show answer
Structures preserve the conditions at deposition and are the geologist's main tool for reading environments and way-up:
What is q1?Show answer
Classify rock salt, shelly limestone and sandstone as chemical, biogenic or clastic. [3 marks]
What is q2?Show answer
Explain how cross-bedding records the direction of an ancient current. [2 marks]
What is q3?Show answer
State how a graded bed shows that strata are the right way up. [2 marks]
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