Any "re-forming" is away from the cave, so the overall effect is the loss of material from the rock bulk.
Caves are typically formed by a combination of erosion and weathering. Erosion from water, wind, and ice can wear away rock formations, while weathering processes such as chemical weathering can dissolve minerals in the rock, creating openings that can eventually form caves over time.
Caves formed from minerals dissolving and re-forming typically occur in limestone, where acidic groundwater dissolves the limestone rock to create voids. As the water carries the dissolved minerals, it can re-deposit them as stalactites, stalagmites, and other cave formations when conditions change. Over time, these processes shape the cave environment.
Groundwater can dissolve minerals in the rock over time, creating underground cavities as the water flows through the rock. The dissolved minerals are carried away by the water, leaving void spaces that eventually form into caves. Over long periods of time, erosion and deposition can also help shape these formations into the caves we see today.
The two minerals dissolve in hot water to form solutions are sugar and salt. They will form a homogeneous solution as they completely dissolve in water.
Caves do not form naturally in slate with the possible exception of sea-caves (and then would be inherently unstable) and shallow rock-shelters. Slate mines (entirely artificial) can be very extensive but these are man-made.
The two minerals dissolve in hot water to form solutions are sugar and salt. They will form a homogeneous solution as they completely dissolve in water.
Limestone is formed in caves through a process called cave formation or speleogenesis. This occurs when water containing dissolved minerals, like calcium carbonate, seeps through cracks in the rock and evaporates, leaving behind deposits of limestone. Over time, these deposits can accumulate to form intricate cave structures.
Calcium Carbonate minerals such as gypsum, selenite and barite
Bacteria do not form caves directly. However, they can play a role in cave formation through processes like bioerosion, where they break down rocks and minerals. Over time, this can contribute to the creation or enlargement of caves.
No, only limestone dissolves.
Stalagmites are formed by water (or another liquid) dripping of the ceiling of a cave. When the liquid drips, it picks up minerals. After it reaches the floor, the water eventually evaporates and the mineral in the liquid is left behind. Over millions of years, those little minerals build up, become solid, and form the rocks that you see in caves today.
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