AAPG Bulletin (1988, May, v. 72, No. 5)
Caption: Well-developed karst topography near Guilin, southern China. Devonian to Upper Carboniferous carbonates forming pinnacles are dark gray, massively bedded, extensively fractured, and contain cavernous porosity (note cave near center of photograph. This erosional topography, if preserved, would become a future plane of an unconformity. Height of exposed unit is approximately 100 m (328 ft). Karst facies developed in carbonates, sandstones, and granites beneath a major erosional unconformity, produce hydrocarbons in the North China Basin. See article in this Bulletin by G. Shanmugam and J.B. Higgins on role of Neocomian unconformity in enhancing porosity in underlying Ivishak Formation. North Slope, Alaska. Photo by G. Shanmugam, Mobil Research and Development Corporation, Dallas, Texas.
“The Art of Geology” edited by Elridge M.
Moores and F. Michael Wahl, Special Paper 225, Geological Society of America
(1988): Photos of tower karst near Guilin in China by G. Shanmugam.
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