The retreating water dissolved away the soft rock and formed the underground cavities, some of which stretch for miles.
12.
Underground cavities slightly alter the local gravitational " signature " in ways that may be detectable from airborne instruments called gravimeters.
13.
He hopes to have better luck with the help of a radar-tracking device that can identify underground cavities or metal objects.
14.
Yerow said most of the grain sorghum stored in traditional underground cavities in the Baidoa region has been destroyed by the flooding.
15.
Ground-penetrating radar could detect the presence of an underground cavity, he said, but that equipment is too expensive and impractical for ordinary cavers.
16.
According to one another version, Ina appeared ( and continues to form ) due to collapsing of the regolith into some underground cavities.
17.
The discovery on March 6, 1881 was entirely coincidental, the local terrain never provided any clues for the existence of an underground cavity.
18.
Breeding takes place in the summer with eggs being laid in small clutches inside rotten logs and stumps and also possibly in underground cavities.
19.
The yellow tuff stone was extensively quarried for centuries, which left large underground cavities that served as aqueducts and cisterns for the collection of rain water.
20.
Since sinkholes are large underground cavities, they have enough room to foster water, making this environment an ideal place for " P . oryzihabitans " to grow.
