Exploring Caves 3479 bytes Summary Exploring Caves Most American caves are big holes that form in limestone rock When water drains away, the waterways turn into open cave tunnels, passages, and caverns It takes 10,000 to 100,000 years to form a cave big enough for people to move around inside Water drips constantly in caves The drips dissolve limestone minerals in one part of the cave In this way, beautiful cave rock formations and crystlas grow over thousands of years These rock formations change dark limestone caves into hidden fantasy lands The Learning Web || Teaching Tools || Exploring Caves USGS || Biology || Geology || Mapping || Water || Search USGS 25 .
(the waterways; turn; into open cave tunnels, passages) (a cave big enough; drips constantly; L:in caves) Context(a cave big enough drips constantly,List([243, 316))):(The drips; dissolve; limestone minerals) (the waterways; caverns; It takes 10,000 to 100,000 years to form a cave big enough) (people; to move; around; L:inside Water) (These rock formations; change; dark limestone caves; into hidden fantasy lands) (Most American caves; are; big holes that form in limestone rock) (beautiful cave rock formations and crystlas; grow; over thousands of years) (big holes; form; L:in limestone rock; T:When water drains away, the waterways turn into open cave tunnels, passages, and caverns It takes 10,000 to 100,000 years to form a cave big enough for people to move around inside Water drips constantly in caves The drips dissolve limestone minerals in one part of the cave In this way, beautiful cave rock formations and crystlas grow over thousands of years These rock formations change dark limestone caves into hidden fantasy lands The Learning Web) (water; drains; away) (The Learning Web; Teaching; )
a cave big enough drips constantly,List([243, 316))
the waterways a cave big enough The drips the waterways people These rock formations Most American caves beautiful cave rock formations and crystlas big holes water The Learning Web
turn drips constantly dissolve caverns to move change are grow form drains Teaching
into open cave tunnels, passages
L:in caves
limestone minerals
It takes 10,000 to 100,000 years to form a cave big enough
around L:inside Water
dark limestone caves into hidden fantasy lands
big holes that form in limestone rock
over thousands of years
L:in limestone rock T:When water drains away, the waterways turn into open cave tunnels, passages, and caverns It takes 10,000 to 100,000 years to form a cave big enough for people to move around inside Water drips constantly in caves The drips dissolve limestone minerals in one part of the cave In this way, beautiful cave rock formations and crystlas grow over thousands of years These rock formations change dark limestone caves into hidden fantasy lands The Learning Web
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