Abstract white ceiling pattern marbled with yellow in Caverns of Sonora, Sutton County, Texas, USA.

Abstract white ceiling pattern marbled with yellow in Caverns of Sonora, Sutton County, Texas, USA. The world-class Caverns of Sonora have a stunning and sparkling array of speleothems (helictites, stalactites, stalagmites, flowstone, coral trees, and other calcite crystal formations). National Speleological Society co-founder, Bill Stephenson said, after seeing it for the first time, "The beauty of Caverns of Sonora cannot be exaggerated...not even by a Texan!" Geologically, the cave formed between 1.5 to 5 million years ago within 100-million-year-old (Cretaceous) Segovia limestone, of the Edward limestone group. A fault allowed gases to rise up to mix with aquifer water, making acid which dissolved the limestone, leaving the cave. Between 1 and 3 million years ago, the water drained from the cave, after which speleothems begain forming. It is one of the most active caves in the world, with over 95% of its formations still growing. Sonora Caves are on Interstate 10, about half-way between Big Bend National Park and San Antonio, Texas.

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Filename: 1403TX-438_Caverns-of-Sonora_Texas.jpg
Copyright: © Tom Dempsey / PhotoSeek.com
Image Size: 8000x5590 / 11.3MB; http://www.photoseek.com/; abstract pattern
Contained in galleries: Highlights 2014, Texas: Caverns of Sonora, 2014 Mar 15-Apr 09: all: southwest (UT, NM, TX), OR, CA

Abstract white ceiling pattern marbled with yellow in Caverns of Sonora, Sutton County, Texas, USA. The world-class Caverns of Sonora have a stunning and sparkling array of speleothems (helictites, stalactites, stalagmites, flowstone, coral trees, and other calcite crystal formations). National Speleological Society co-founder, Bill Stephenson said, after seeing it for the first time, "The beauty of Caverns of Sonora cannot be exaggerated...not even by a Texan!" Geologically, the cave formed between 1.5 to 5 million years ago within 100-million-year-old (Cretaceous) Segovia limestone, of the Edward limestone group. A fault allowed gases to rise up to mix with aquifer water, making acid which dissolved the limestone, leaving the cave. Between 1 and 3 million years ago, the water drained from the cave, after which speleothems begain forming. It is one of the most active caves in the world, with over 95% of its formations still growing. Sonora Caves are on Interstate 10, about half-way between Big Bend National Park and San Antonio, Texas.