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What is a subsidence doline and how are they formed?
A subsidence doline is a sinkhole that forms when layers of rock above an underground cavity collapse. This collapse can be triggered by factors such as erosion, groundwater depletion, or human activities. Subsidence dolines are typically circular and can vary in size from a few meters to hundreds of meters in diameter.
What is formed when a cavern roof colappese?
A doline or shake-hole - and depending on the nature of both cave and collapse it can create an entrance to the cave.
How a doline is formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
What is S Group's population?
The population of S Group is 35,899.
What is the population of 's-Hertogenbosch?
The population of 's-Hertogenbosch is 136,499.
What is the population of 's-Gravenzande?
The population of 's-Gravenzande is 19,190.
What is S-chanf's population?
The population of S-chanf is 3,788.
What is the population of 's-Graveland?
's-Graveland's population is 1,250.
What is the population of 's-Heerenhoek?
The population of 's-Heerenhoek is 1,939.
What is Tuqu''s population?
Tuqu''s population is 8,881.
What is the population of 's-Heerenberg?
's-Heerenberg's population is 8,000.
What is Izra''s population?
Izra''s population is 14,722.
