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Mudstone is a sedimentary rock - Edexcel - GCSE Chemistry - Question 3 - 2018 - Paper 1
Question 3
Mudstone is a sedimentary rock. Slate is a metamorphic rock formed from mudstone. Describe the conditions required to form slate from mudstone.
Worked Solution & Example Answer:Mudstone is a sedimentary rock - Edexcel - GCSE Chemistry - Question 3 - 2018 - Paper 1
Step 1
Describe the conditions required to form slate from mudstone.
Answer
To form slate from mudstone, specific conditions must be met:
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Increased Pressure: The mudstone must experience significant pressure, which usually occurs as sedimentary layers are buried under additional material over time.
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Metamorphic Heat: A moderate level of heat is necessary, typically below 200°C, which compacts and alters the mudstone's mineral composition, transforming it into slate.
These conditions lead to the alignment of the minerals, giving slate its characteristic foliation.