Cretaceous and lower Tertiary stratigraphy of the Gurabo and El Yunque quadrangles, Puerto Rico : a description of the largely marine-deposited volcaniclastic rocks and subordinate lava flows and pelagic mudstones that underlie this part of eastern Puerto Rico / by Victor M. Seiders.
Publication Info.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1971.
Washington : United States Government Printing Office
Description of the largely marine-deposited volcaniclastic rocks and subordinate lava flows and pelagic mudstones that underlie this part of eastern Puerto Rico