... A dams , F rank D. ; Memoir of Sir J. William Dawson 550 A gassiz , A., cited on coral reefs of Hawaiian islands 31 — — — Oahu coral reefs 30 — — — valley glaciers in New England 439 A guflera , J. G., cited on geology of Sonora, Mexico 11, 12 A labama , Oriskany formation in 322 A lexander , W. D...

... of the Clarion River. The bedrock surface through the valley encompassing East Branch Dam reservoir lies within the Shenango Formation of the Mississippian System and the overlying Pottsville Formation of the Pennsylvanian System. Consequently, the Shenango Formation underlies the entire footprint of the dam...

... : Boca Raton, Florida , CRC Press , p. 197 – 238 . von Stackelberg , U. , and Beiersdorf , H. , 1991 , The formation of manganese nodules between the Clarion and Clipperton fracture zones southeast of Hawaii : Marine Geology , v. 98 , p. 411 – 423 , https://doi.org/10.1016/0025-3227...

... form occurs at least as low as the Spaniard limestone of the upper Savanna formation. Species rather than genera of the family of Fusulinidae must be used in separating Kanawha from Allegheny or Lampasas from Des Moines series if Clarion and equivalent beds are assigned to the upper Pottsville...

... of central Texas. That orogeny is followed somewhat later by epeirogeny has been similarly interpreted for other overthrust mountain systems. As previously discussed, Ashley and Read have advocated placing the Pottsville-Allegheny boundary between the Clarion and Kittanning formations. Certain changes...

... of regional stratigraphic variation. TABLE I. STRATIGRAPHIC CLASSIFICATION OF ALLEGHENY SERIES IN WESTERN PENNSYLVANIA SHOWING MAJOR COAL BEDS AND STRATICRAPHIC INTERVALS BETWEEN THEM Formation Coals and Intervals Freeport Upper Freeport 25 feet Lower Freeport 30 feet Kittanning...

... . All relevant data – including oceanographic, hydrographic, geological, chemical and biological data, data standards and inventories, cruise reports, and raw environmental data – must be published in the format established by the International Seabed Authority and all data must be made freely available...

... understand the importance of magmatic processes on ocean-basin formation – including the flux of heat, fluid and chemicals between the mantle, crust and oceans. This, and the awareness of plate boundaries acting as loci for active mineralization ( Figs. 1 , 2 ), has had a huge impact on our appreciation...

... and exposed to intense weathering, the southern boundary of this uplifted area would coincide roughly with the projected position of the Tyrone-Mt. Union lineament. The Pennsylvanian Vanport limestone member of the Clarion Formation is characteristically a fossiliferous, dark-gray limestone of marine...

... with the names of formations, important members, and diagnostic fossils, are shown in Figure 1 . Major facies changes to the west of Clearfield involve increasing marine character of shales above all coal beds below the upper Kittanning, better sorting and increasing quartz content of sandstones below...

... millions of years. Figure 1 Global distribution of Fe–Mn coatings from both deep-ocean and shallow-water settings; blue is ocean areas within the 200-nautical-mile Exclusive Economic Zone of coastal nations, and black is oceanic areas beyond national jurisdictions. CCZ = Clarion–Clipperton Zone; PCZ...

... of elements in the life cycle of plants and animals, and (6) formation of new minerals in the basin of deposition. The last three factors are partly dependent on temperature, pressure, salinity, pH, and redox potential in the basin of deposition and therefore are most likely to result in useful...

... ). High contents of Ga were first detected by ICP-MS in different genetic types of marine Fe-Mn deposits. For example, the content of Ga in diagenetic ferromanganese nodules (FMN) of the Clarion-Clipperton Zone is within 57–212 ppm ( Dubinin and Uspenskaya, 2006 ). Analysis of published data showed...

.... , Bagge , M. , and Wilson , D.S. , 2013 , Seafloor spreading anomalies and crustal ages of the Clarion-Clipperton zone : Marine Geophysical Research , v. 34 , p. 79 – 88 , doi:10.1007/s11001-013-9184-6. Fisher , A.T. , 2005 , Marine hydrogeology: Recent accomplishments and future...

... of the high seas. Abbreviations: CCZ = Clarion-Clipperton zone, Peru B. = Peru basin, Penrhyn B. = Penrhyn basin, PCZ = Prime Crust zone. Modified from Hein et al. ( 2013 ) and Petersen et al. ( 2016 ). More than 80% of the permissive areas for manganese nodules are beyond national jurisdictions...

... development of the Medina (Lower Silurian) gas pools. The 8 discoveries are: the Artemas field, Bedford County; Mays pool, Clarion County; Sabula pool, Clearfield County; Fike field, Fayette County; Crichton and Hadden pools, Indiana County; Mt. Zion field, Somerset County; and the Sloan pool, Westmoreland...

... 15 Map Index No. Operator Well Name Well Location Basis for Location Completion Date Total Depth of Well ( Feet ) Producing Depth ( Feet ) Initial Production Bbls./Da.-Oill MCF/Da.-Gas API Gravity-Oil BTU-Gas Producing Formation Deepest Formation Tested Name...

... associated with the deposits and the interpretation of the data obtained to pinpoint the location of the deposit site. The latter relies on a thorough understanding of the mode of formation of the deposits and their relationship to their environment of deposition. Geochemical exploration for placers...

..., but results have not been encouraging. One dry hole was completed in each of Clarion, Butler, Armstrong, and Fayette counties, while two dry holes were drilled in Beaver County. In the Summit pool on the Chestnut Ridge anticline in Fayette County, two gas wells were completed, one producing from...

... with an established mining framework. The commodity boom that occurred during this second phase, also generated renewed interest in polymetallic nodules, particularly in the Clarion–Clipperton Zone of the eastern Pacific. Unlike the first phase, ownership issues were largely solved by the formation...