The Río Abajo, Pitahaya, and Daguao Formations in eastern Puerto Rico : a description of three largely volcaniclastic units, which are assigned an early Cretaceous age
The Río Abajo, Pitahaya, and Daguao Formations in eastern Puerto Rico : a description of three largely volcaniclastic units, which are assigned an early Cretaceous age / by John W. M'Gonigle
Series Titles:
Geological Survey bulletin ; 1435-B Contributions to stratigraphy Geological Survey bulletin ; 1435-B. Contributions to stratigraphy.