Intrusive Plutonic Features (Leaving Cert Geography): Flashcards
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What is a Batholith?
What is a Batholith?
The largest intrusive volcanic landform, over 100 km².
How is a Batholith formed?
How is a Batholith formed?
Magma cools and solidifies into granite in the crust.
What shape does a Batholith have?
What shape does a Batholith have?
It has a domed top with gently sloping sides.
What is the geographic significance of the Leinster Batholith?
What is the geographic significance of the Leinster Batholith?
It is a granite intrusion in east Ireland, influencing geology.
What rock primarily composes the Leinster Batholith?
What rock primarily composes the Leinster Batholith?
Granite is the main rock forming the batholith.
What rocks surround a Batholith?
What rocks surround a Batholith?
Usually metamorphic rocks, like quartzite and schist.
How are Sills formed?
How are Sills formed?
Magma is injected horizontally between sedimentary layers.
What forms when magma is injected vertically?
What forms when magma is injected vertically?
Dykes are formed, widening fissures in the rock.
Characteristics of Laccoliths?
Characteristics of Laccoliths?
They have a domed top and a flat base from magma push.
What tectonic activity formed Leinster's fold mountains?
What tectonic activity formed Leinster's fold mountains?
The collision of the African and Eurasian plates.