Folding (Leaving Cert Geography): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
Folding definition
Folding definition
Rock layers bend (not break) when compressed by colliding tectonic plates
Ductile rock
Ductile rock
Flexible rock that can change shape without breaking
Anticline
Anticline
Rock folded upwards, creating peaks and ridges
Syncline
Syncline
Rock folded downwards, forming valleys
Symmetrical fold cause
Symmetrical fold cause
Equal pressure from both colliding plates
Asymmetrical fold cause
Asymmetrical fold cause
One plate pushes harder than the other
Overturned fold cause
Overturned fold cause
One plate applies much more pressure, fold tips over
Caledonian orogeny period
Caledonian orogeny period
450-400 million years ago
Direction of Caledonian mountains in Ireland
Direction of Caledonian mountains in Ireland
Northeast to southwest
Armorican orogeny period
Armorican orogeny period
270-250 million years ago
Direction of Armorican mountains in Ireland
Direction of Armorican mountains in Ireland
East-west
Alpine orogeny timeframe
Alpine orogeny timeframe
60 million years ago to present (still ongoing)
Ireland's tallest mountain
Ireland's tallest mountain
Carrantouhill (1,037 metres)
Monocline
Monocline
Upland structure from small earth movements, rock tilts slightly
Doming cause
Doming cause
Rising magma beneath crust pushes rock layers upward