What is the difference between a concordant body and a discordant body?
A sill is concordant with existing layering, and a dyke is discordant. If the country rock has no bedding or foliation, then any tabular body within it is a dyke.
What are concordant bodies?
[kən ′kȯrd·ənt ¦bäd·ē] (geology) An intrusive igneous body whose contacts are parallel to the bedding of the country rock. Also known as concordant injection; concordant pluton.
What is the difference between concordant bodies and discordant bodies of igneous rock?
Concordant: In a similar manner, the concordant rock masses necessarily run parallel to the structure of the country rocks in which they occur. If the country rock be made up of sedimentary bedding, a concordant intrusive mass should run parallel to the bedding planes while a discordant body must cut across them.
Is a concordant body?
It is a concordant body, with flat bottom and convex upward. It is dome or mushroom shaped….
| Intrusion in Unfolded Region | Intrusion in Folded Region | |
|---|---|---|
| Concordant Forms | Sill Laccoliths Lopoliths | Phacolith Concordant Batholiths |
What is geology boss?
Geology. a knoblike mass of rock, especially an outcrop of igneous or metamorphic rock.
What is Phacolith in geography?
A phacolith is a pluton of igneous rock parallel to the bedding plane or foliation of folded country rock. More specifically, it is a typically lens-shaped pluton that occupies either the crest of an anticline or the trough of a syncline.
What is meaning of concordant?
concordant in American English (ʌnkənˈkɔrdənt ) adjective. agreeing; consonant; harmonious.
What is concordance and discordance?
7. 3. A pair of observations is concordant if the subject who is higher on one variable is also higher on the other variable. A pair of observations is discordant if the subject who is higher on one variable is lower on the other variable.
Is dike concordant or discordant?
A sill is concordant with existing layering, and a dike is discordant. If the country rock has no bedding or foliation, then any tabular body within it is a dike.
Where do rocks melt?
When a rock melts, it isn’t a rock anymore, it’s magma (if it’s beneath the surface) or lava (above the earth’s surface). The melting occurs as a result of high temperatures, which almost always occur below the surface of the earth – making it magma.
What is dike volcano?
Dikes are tabular or sheet-like bodies of magma that cut through and across the layering of adjacent rocks. They form when magma rises into an existing fracture, or creates a new crack by forcing its way through existing rock, and then solidifies.
How do sills form?
Sills: form when magma intrudes between the rock layers, forming a horizontal or gently-dipping sheet of igneous rock. The Whin Sill (top left image) in N. England provided a defensive cliff-line on which the Romans built Hadrian’s Wall.
What’s the difference between discordant and concordant coasts?
Concordant coasts are also known as dalmatian coasts, after the Dalmatian region of Croatia, or Pacific coasts, after the coastline of Chile in South America. Discordant These are where rock strata or structures are aligned at an angle to the coastline. Discordant coasts have a crenellated pattern of projecting headlands and indented bays.
Which is an example of a discordant igneous rock body?
DISCORDANT A discordant igneous rock body cuts across the pre-exiting rock bed. A dike is an example of discordant rock bodies. 2. CONCORDANT A concordant igneous rock body runs parallel to the pre-existing bedrock. Laccoliths and sills are examples of concordant igneous rock bodies.
How are concordant and discordant pairs used in Tau?
The number of concordant and discordant pairs are used in calculations for Kendall’s tau, which measures the association between two ordinal variables. The procedure for calculating concordant and discordant pairs compares the classifications for two variables (for example, X and Y) on the same two items.
What makes a pair of observations concordant or discordant?
A pair of observations is concordant if the subject who is higher on one variable is also higher on the other variable. A pair of observations is discordant if the subject who is higher on one variable is lower on the other variable. Beginner, Low * Intermediate, Med = 50