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EnglandGeologyQuick questions
Module 4: Interpreting the past - Sedimentary environments
Quick questions on Sedimentary environments and facies: cross-bedding, graded bedding, depositional environments and logs - OCR 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 are the main environments?Show answer
Each environment leaves a characteristic facies:
What are sedimentary logs?Show answer
A sedimentary log is a vertical record of a succession (lithology, grain size, bed thickness, structures and fossils). Reading it bottom to top reveals environmental change through time: fining-upward and coarsening-upward patterns, and changes from continental to marine facies, record processes such as channel migration, delta progradation, and transgression (sea advancing) or regression (sea retreating).
What is q1?Show answer
Define a facies. [2 marks]
What is q2?Show answer
State what graded bedding indicates about the process and environment. [2 marks]
What is q3?Show answer
Explain how desiccation cracks help interpret an environment. [2 marks]
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