They are not as a general rule, because caves don't contain economic minerals - apart from their host limestone.
In the past, metal-ore mines occasionally broke into natural caves by accident,such as in the Peak District of the English Midlands (18-19C lead mining).
No, of course not. They work in coal mines. Caves don't develop in the Coal Measures. Some 18-19C lead-miners in places like the Peak District (English Midlands) broke into or mined from natural caves in the area's Carboniferous Limestone. They were exploiting ore-bodies that had been intercepted by later cave development. The iron-ore deposits in the Forest of Dean (England) did form within caves, but as a general rule caves and economic metallic ores do not otherwise co-exist. Oh, and the adjective "underground" is tautologous!
The main types of caves are solution caves, lava caves, sea caves, glacier caves, and talus caves. Solution caves form from the dissolution of soluble rocks like limestone; lava caves are created by flowing lava; sea caves are carved by the action of waves on coastal cliffs; glacier caves form within glaciers due to melting and refreezing processes; and talus caves are formed by fallen rocks creating cave-like structures.
Mines and caves are different things. Mines are often in or below weak strata and have been excavated relatively quickly, intensifying the stress on the overlying rocks. Caves, which are natural by definition, tend to be in more competent formations, but they can collapse due to erosion. Movements on faults crossing a cave can also produce collapses in the breccia around the fault. Much of a cave formed on a fault is filled with angular boulders as the surrounding limestone was heavily fractured by the folding and faulting. As the cave developed in the usual way - dissolution of the limestone by water - these blocks simply lost lateral support and fell from the cracked walls.
Yes, there are various types of caves, including limestone caves, lava tubes, sea caves, ice caves, and solution caves. Each type of cave is formed through different geological processes and conditions, resulting in unique characteristics and features.
Crystal Caves was created on 1991-10-23.
They were originally building-stone mines.
yes austrlia has the best opal mine on earth+++Ah, yes, mines. The questioner asked about caves - and caves do not normally contain gem-stone material.
yes austrlia has the best opal mine on earth+++Ah, yes, mines. The questioner asked about caves - and caves do not normally contain gem-stone material.
Crystal's are Under Ground , Caves , and Mines. They are at the Museum should go there are all type's of them.
No, of course not. They work in coal mines. Caves don't develop in the Coal Measures. Some 18-19C lead-miners in places like the Peak District (English Midlands) broke into or mined from natural caves in the area's Carboniferous Limestone. They were exploiting ore-bodies that had been intercepted by later cave development. The iron-ore deposits in the Forest of Dean (England) did form within caves, but as a general rule caves and economic metallic ores do not otherwise co-exist. Oh, and the adjective "underground" is tautologous!
Since late 18C: they are not caves but stone mines last worked c.1810; and part of a series of such workings from St. Alhelm's Head to Durlston Head.
The Crystal. Arkansas has numerous Crystal caves / mines all over the state. IT is really a beautiful state to visit.
They are old chalk and flint mines, not natural caves despite the name. First record: c.1250. Last mining: c.1830 So roughly 700-800 years old.
Vampire bats live throughout Mexico, Central America, and South America. They will nest in caves, mines, tree hollows, abandoned buildings, and anywhere else that provides them with a dark shelter to hang out in.
Rattlesnakes do not build a home, they use existing shelters - rock crevices, under logs, caves, mines, etc.
Gold ores are found in the Garmon Upper and Lower Mines, and some can be found in the Watery Caves.
Their are hundreds of mines in a Minecraft world, you just have to find them underground and in caves. They just look like a tunnel with a lot of stuff you can mine on the sides.