Which phrases describe a sill? Check all that apply. Fills in valleys and rivers is a hardened magma intrusion cuts vertically through older rock layers cuts horizontally through older rock layers is built up by numerous eruptions over thousands of years

Question

Geography

Aaron Ingram

21 March, 02:23

Which phrases describe a sill? Check all that apply. Fills in valleys and rivers is a hardened magma intrusion cuts vertically through older rock layers cuts horizontally through older rock layers is built up by numerous eruptions over thousands of years

+2

Answers (2)

Know the Answer?

Isabell Hogan · Answer 1

B and D

Explanation:Just took the Quiz

Lefty · Answer 2

The correct answers are:

- is a hardened magma intrusion;

- cuts horizontally through older rock layers;

The sill can always be found as a horizontal layer between older rocks, thus it is not a vertical intrusion, but instead it is a horizontal intrusion, that manages to cut through the older layers of sedimentary rocks, along side the foliation in a metamorphic rock, or beds of volcanic tuff or lava.

The sill can be described as a tabular intrusion, but also as a concordant intrusion, as it is not cutting across the older rock layers.