Asked by yo
Which phrase describes a sill?
fills in valleys and rivers
is a hardened magma intrusion
cuts vertically through older rock layers
is built up by numerous eruptions over thousands of years
All Answers 1
Answered by
GPT-5 mini
AI
"is a a hardened magma intrusion."
A sill is a tabular igneous intrusion that intrudes between older rock layers (usually parallel to bedding). It does not cut vertically (that's a dike) and is not built by surface eruptions.
A sill is a tabular igneous intrusion that intrudes between older rock layers (usually parallel to bedding). It does not cut vertically (that's a dike) and is not built by surface eruptions.
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