It is called weathering.
Angus Mraz
== == The dissolution of rock by acidic water, and the resulting collapse and erosion of surrounding rock.
Waves pounding the shoreline can make cracks. The cracks then gradually get larger and turn into a small cave. When the cave wears through the headland, an arch forms. Further erosion causes the arch to collapse, leaving the pillar of hard rock standing away from the coast-the stack. Eventually, erosion will cause the stack to collapse, leaving a stump.
This is described as a normal fault.
intrusive forms below the earths surface, and extrusive above
Igneous rocks are formed from the cooling of lava/magma. (Lava is magma that has been moved from beneath the Earth's surface to above.) They can be formed above or below the Earth's surface- when formed above is called 'Extrusive Igneous rock' and when formed below is 'Intrusive Igneous rock'. When a rock is extrusive, it forms small crystals. When it is intrusive, it causes large crystals to form.
When rock above a cave collapses, a sinkhole is formed.
When rock above a cave collapses, a sinkhole is formed.
It is called weathering.
Same as any cave collapse: erosion weakening the surrounding rock.
Erosion of rock by water flowing under the ground will form caves. If too much rock is removed, the roof of the cave may collapse, creating a large sinkhole.
== == The dissolution of rock by acidic water, and the resulting collapse and erosion of surrounding rock.
It is called weathering.
It is called weathering.
It is called weathering.
Calcite, usually, from the limestone above the cave. (Or gypsum, if the cave is in that rock)
Metamorphic rock.
Waves pounding the shoreline can make cracks. The cracks then gradually get larger and turn into a small cave. When the cave wears through the headland, an arch forms. Further erosion causes the arch to collapse, leaving the pillar of hard rock standing away from the coast-the stack. Eventually, erosion will cause the stack to collapse, leaving a stump.