I think I could be wrong, but is it because naturally acidic rain can cause limestone to dissolve, and this can make a cave?
(I came across this during revision and this completely confused me, I'm almost sure to fail! But this is just what I guessed via the text!)
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You are right in describing what are called "karst" caves, i.e. those formed in limestone by slightly acidic water dissolving it, but other types of cave in non-limestone rocks exist, formed by other mechanisms.
Calcite can be found in cave formations such as stalactites, stalagmites, and flowstones. These formations are created when calcium-rich water drips or flows through the cave, leaving deposits of calcite behind as it evaporates.
Caves! Though you will also find them in some artificial subterranean structures, provided the necessary sources of calcium carbonate and water charged with carbon-dioxide to produce carbonic acid, are available. They need to be in air to form. They won't grow underwater, apart from certain forms of stalagmite deposit associated with pools or gently-trickling flows.
You've not given a "following" list from which to choose! Most of the world's caves are formed in limestone.
You would likely find sedimentary rock in caves, as it is common for caves to form in limestone, dolomite, or sandstone due to the processes of erosion and underground water flow. Igneous and metamorphic rocks are less common in caves, but can also be present in certain geological settings.
Limestone can be commonly found in areas where there were once ancient seabeds, such as in sedimentary rock formations, cliffs, caves, and quarries. It is also used as a building material in construction projects.
Stalactites are often found in caves.
Caves formed in limestone, as the vast majority are - but there are many caves that contain few or no "speleothems" as the formations are know collectively. The distribution and scale of the formations is subject to many, complex factors.
Calcite can be found in cave formations such as stalactites, stalagmites, and flowstones. These formations are created when calcium-rich water drips or flows through the cave, leaving deposits of calcite behind as it evaporates.
In caves formed in limestone - as are most of the world's caves although not all such caves contain stalagmites and stalactites. They are precipitations of calcite dissolved from the host limestone by carbonic acid - rain water acidified by atmospheric carbon dioxide dissolved in it.
Miners can find valuable minerals such as gold, silver, copper, and diamonds in caves. Additionally, caves can contain geological formations like stalactites and stalagmites that are sought after for their beauty and rarity. However, mining in caves can be dangerous and environmentally damaging.
They typically form in caves where they can grow undisturbed for hundreds of years. Stalagmites grow from the floor up and stalactites stick to the ceiling. Dripping water deposits minute amounts of limestone that build up over the years. +++ You do sometimes find small, rather coarse versions growing under bridges etc.built from bricks or ashlar masonry and mortar. Here, the calcite that is their constituent mineral has been leached from the structure's mortar. However caves in limestone (the rock hosting by far the majority of caves) are the natural home for stalagmites and stalactites, and their related formations.
Stalactites and stalagmites can also form in underground tunnels, lava tubes, mines, and man-made structures like abandoned buildings and tunnels. They require a source of water to form as minerals are deposited over time.
Stalactites and stalagmites can be found in various caves throughout the UK, such as Cheddar Gorge in Somerset, Wookey Hole Caves in Somerset, and Dan yr Ogof in Wales. These formations are created over thousands of years by mineral-rich water dripping from the cave ceiling and depositing calcium carbonate.
It depends on the cave. Since many caves are limestone (water carves it nicely), you usually find limestone. But granite is common in New Hampshire & Vermont.
It's more accurate to ask what types of rock hold caves, given that a cave is a lack of rock, as i think that's what you mean! Most caves form in limestone, so the floor, walls and roof are of limestone, as are most of the boulders on the floor. Rivers can also wash in cobbles of other rock, such as Millstone grit from above the Limestone in Carboniferous formations. Lava tubes form in low-viscosity lava flows, so are in basalt or similar low-Si rock. You can also find minor caves and rock-shelters formed in other competent rocks by fluvial or sub-aeriel weathering. E,g, sea-caves, and cavities sand-blasted into sandstone rock-faces by desert sand-storms.
Stalactites are found hanging from the ceilings of caves, while stalagmites grow upwards from the cave floor. Stalactites point downwards, and stalagmites point upwards.
Caves! Though you will also find them in some artificial subterranean structures, provided the necessary sources of calcium carbonate and water charged with carbon-dioxide to produce carbonic acid, are available. They need to be in air to form. They won't grow underwater, apart from certain forms of stalagmite deposit associated with pools or gently-trickling flows.