Abstract The area of northern Mexico and Texas combines elements from two different tectono-stratigraphic provinces—(a) the Gulf of Mexico province (GOM province), located along the northwest rim of the present-day Gulf of Mexico in northeast Mexico and south Texas, and (b) the western Pacific Mexico province (WPM province), located in northwest Mexico and west Texas—and thereby enables one to compare and contrast Gulf of Mexico-driven versus Pacific-driven tectonostratigraphic processes. The area addressed in this paper (that is, the northwest rim of the Gulf of Mexico) contains elements related to both Gulf of Mexico passive-margin development (principally the stratigraphy) and to the Pacific-related convergent margin (arc) tectonism (chiefly the structure). The emphasis in the paper is on the GOM province, with particular reference made to the Sierra Madre Oriental region in the vicinity of the cities of Monterrey and Saltillo, in northeast Mexico.

Abstract The Powder River Basin contains the most important coal deposits in the United States* Though the unit gas concentration of Powder River Basin coals is uniformly low, the sheer magnitude of the coal resource ensures a large potential gas resource

Abstract The Western Washington coalbed methane province defined in this study comprises three broad regional target areas totaling approximately 6,500 sq mi and encloses four targets with a total area of approximately 1,800 sq mi. The methane resource contained in this province is estimated to range at a minimum between 0.3 and 3.0 trillion cubic feet and at a maximum between 2.6 and 24 trillion cubic feet.