Question

what are dykes ? What are sills?

Answer 1

1) Dykes are igneous rocks that intrude vertically while sills are the same type of rocks that cuts horizontally in another land or rock form.

2) Dykes are discordant intrusion while sills are concordant intrusions.

3) Dykes and sills from due to pressure, force and stress from one point of origin. Dykes form when the point of origin is beneath the forming dyke and sill si formed when the starting point is either on the left or right side.

4) Both dykes and sills can be magmatic or sedimentary in nature. They are also slimmer, younger and wider than their surrounding rocks or plates. Dykes and sills as intrusion often have a different color from their surrounding rocks.

5) Dykes are easier to distinguish because the intrusion is evident between bedding planes and rock while sills can be harder to identify since it exists in parallel with the planes and the rocks. Only proper testing and discoloration between rocks can state whether a plane is a sill or part of the original rock formation.

Answer 2

hello friend here's your answer

=>Dykes- when magma solidifies in vertical columns (crack and forums) of the bed rocks they are called dykes.

=>Sills- when lava solidifies before coming out between the horizontal layers of parent rocks are called sills.

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