Table of Contents
What are the four types of igneous intrusions quizlet?
Terms in this set (18)
- Intrusion. Any igneous rock that forces its way into a pre-existing rock.
- Country rock. Any rock into which an igneous rock has intruded.
- Minor intrusions. These cool at hypabyssal depths below the surface and include sills and dykes.
- Major intrusions.
- Sills.
- Transgressive sill.
- Dykes.
- Batholith.
What are the 4 rock formations?
What Are the Different Types of Rocks?
- Igneous rocks.
- Metamorphic rocks.
- Sedimentary rocks.
What causes intrusions in rock layers?
Igneous intrusions form when magma cools and solidifies before it reaches the surface.
How do batholiths stocks and laccoliths differ?
How do batholiths, stocks, and laccoliths differ? Batholiths are the largest type of igneous bodies and occur in a linear fashion with a distance of 100km or more; stocks are smaller than batholiths; laccoliths bend the sedimentary layers above them, whereas the sedimentary layers below remain relatively undeformed.
What are the 5 intrusive igneous rock structures?
Intrusive Structures
- Dikes. A dike is an intrusive rock that generally occupies a discordant, or cross‐cutting, crack or fracture that crosses the trend of layering in the country rock.
- Sills.
- Laccoliths.
- Volcanic necks.
- Plutons.
What is the most common plutonic rock?
The most common rock types in plutons are granite, granodiorite, tonalite, monzonite, and quartz diorite. Generally light colored, coarse-grained plutons of these compositions are referred to as granitoids.
What is the difference between a stock and a pluton?
A “pluton” is any large igneous body that has congealed from magma underground. A batholith is the largest of the pluton types and by definition cover at least 100 square kilometres. A stock is a small discordant pluton, shaped like a batholith but falling below the necessary 100 square km in extent.
What are the three components of magma?
Magma and lava contain three components: melt, solids, and volatiles.
Is the fault older or younger than rock layer A?
A fault is always younger than the rock it cuts through. The surface where new rock layers meet a much older rock surface beneath them is called an unconformity.