Intrusive igneous rocks

Types of intrusive igneous rocks .

1. INTRUSIVE IGNEOUS ROCKS -Forms when megma intrudes in to bedrock and slowly cools

2. DYKES- These cut the bedding of rocks vertically , hence discordant in nature SILLS- These Spreads parallel to the bedding planes of the rocks , concordant in nature .

3. LACCOLITHS: It is a concordant body, with flat bottom and convex upward. It is dome shaped LOPOLITHS : These are basin or saucer-shaped concordant bodies with top nearly flat and convex bottom LOPOLITHS LACCOLITHS

4. PATHOLITHS- These are concordant bodies that occurs along the crests and troughs of the folded sedimentary strata. BATHOLITHS : These are the largest kind of plutons , irregular in shape and occupies large area.

5. NECK- It is cylindrical conduit that fed magma upward to a volcanic vent or it is a conduit of the ancient volcano. BYSAMILITHS- these are more or less vertical cylindrical bodies that crosscut (discordant) adjacent sediments and are bounded by steep faults .

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