Rocks In General. Flashcards
How do igneous rock form?
When magma and lava cools making bassalt and granite.
Granite forms when…
Magma cools in crust, cools very slowly over thousand of years. And it allowed different minerals in lava such as silica as they grow into crystals.
Bassalt rock…
Cools quickly, it has contact with air snow and water. Fast cooling so doesn’t allow crystals. The crystals are microscopic.
The formation of a sedimentary rock is..
Deposit of pre existing rocks or pieces of once living organism on earths surface.
Metamorphic rocks are…
When other rocks are affected by great heat and pressure.
Bassalt forms on…
Surface from cooling lava at volcanoes and fissure eruptions.
More about bassalt is that
It has air bubbles in it 🫧
Where is Bassalt rock founded in Ireland ?
Giants causeway Co.Antrim
What is bassalt used for?
Road chippings.
What colour is bassalt ?
Dark black/ brown
Where is granite formed in?
Underground.
How are granite rocks formed?
Magma pushes into crust but doesn’t reach surface.
What is the colour of a granite rock?
Pale grey / pink
Where are granite found in Ireland?
Wicklow mountains and Galway.
What is granite used for
Worktop and shopfronts,
How are sandstone formed?
Formed when large amounts of sand were worn away in the earths crust .
Where is sandstone deposited on ?
Beds, lakes or sea floor.
Colour of sandstone ?
Brown to red in colour.
Where is sandstone founded:
Macgillycuddy in County Antrim
How are limestone formed ?
Remains of Dead Sea creatures pile up on the bed of the sea.
Over millions of years, limestone…
Become compressed and cemented together making strata
What does strata mean?
It means layers.
Where is limestone founded?
In Burren, Co. Clare
What is the most common rock type found in Ireland?
Limestone.
How hot can magma might be？
1200°C
Fact:
Metamorphic rocks might change their colour and often become harder to wear away.
How is marble formed?
When limestone is placed under great heat and pressure.
How is quartzite formed?
When sandstone comes under great heat and pressure. This is usually folding when sandstone comes in contact with magma within the crust .
Last fact…..
Well done ! U finished the flash card of rocks! Don’t forget to revise ur notes and be positive about your exam.
