What is a Disconformity in geology?
Disconformity: exists where the layers above and below an erosional boundary have the same orientation. Nonconformity: develops where sediments are deposited on top of an eroded surface of igneous or metamorphic rocks.
How do you measure Disconformity?
If there is a significant gap in geologic time between the two layers - for example, if the layer beneath is Cambrian in age and the layer above is Devonian in age - then it can be inferred that the contact between the layers is a disconformity.
What are three different types of intrusions?
Three common types of intrusion are sills, dykes, and batholiths (see image below).
What is the largest type of Pluton?
The Wa- thaman batholith is thus the largest known Precambrian pluton and is comparable in size to Mesozoic batholiths in the western Cordilleras of North and South America.
What is a example of unconformity?
For example, the contact between a 400‐million‐year‐old sandstone that was deposited by a rising sea on a weathered bedrock surface that is 600 million years old is an unconformity that represents a time hiatus of 200 million years.