This type of speleogenesis (SPEE-lee-oh-JEN-uh-sis), or cave formation
, is unusual.
The variety of rocks used to construct this desert igloo range from copper ore to cave formations
I went there to see the best cave formations
in the UK and help to film them, and I still want to do that.
After a winter of further trail construction, the tour expanded last summer into the Landmark Room, home to a pristine collection of rare cave formations
The cave, open year-round, boasts a variety of cave formations
, flowstone deposits and corridors.
Almost everywhere I turned--on the ceiling, along the walls, underfoot, hanging off ledges--I saw cave formations
that put every "crystal" or "cathedral" cave I had ever visited to shame.
Other highlights of the region include spectacular cave formations
, wildlife centres and adventure tours.
The Caverns of Sonora is a National Natural Landmark due in part to the phenomenal display of speleothems known as "helictites" and in particular "bladed helictites," rare and beautiful cave formations
By studying Siberian cave formations
as old as 500,000 years, researchers have found that even moderate climate warming in the past has set off significant thawing of permafrost.
The cave was also a great source for stalagmites - common cave formations
formed over thousands of years as minerals from water droplets crystallize and accumulate.
While cave formations
have previously been used as climate indicators, past analyses have relied on relatively crude sampling tools, typically small dental drills, which required averaging across 10 or even 100 years at a time.
Dozens of types of cave formations
have been documented here, including stalactites, stalagmites, flowstones, shields, aptly named "fried eggs" and "bacon," columns, and fragile, narrow "soda straws.