Results 131 to 140 of about 2,124,047 (278)

Spatial Distribution of the Surface Geology and 1992 Land Use of the Buffalo River Watershed [PDF]

, 1995
The Buffalo River was established by Congress in 1972 as the first National River in the United States and is one of the few remaining free-flowing streams in Arkansas .
Hofer, Kimberly R., McKimmey, James M., Scott, H. Don   +2 more
core   +2 more sources

An airborne geophysical survey of part of west Dyfed, South Wales, and some related ground surveys [PDF]

, 1986
A detailed airborne geophysical survey has been made of part of west Dyfed at a flying height of 75 m with magnetic, electromagnetic (VLF-EM) and radiometric equipment mounted in a helicopter.
Cave, R., Cornwell, J.D.
core  

Litho-paleoecological characteristics of the Upper Ordovician reef Bol'shaya Kos'yu (Ilych River, Northern Urals)

Литосфера, 2016
The litho-paleoecological characteristics of the Upper Ordovician reef Bol’shaya Kos’yu was given. The reef paleolandscape profile - reef plateau, reef internal lagoons, and frontal reef zone was determined, and reef facies were described.
L. A. Shmeleva
doaj  

Lower Mississippian Lithostratigraphy, Northern Arkansas [PDF]

, 1976
Lower Mississippian lithostratigraphic units in northern Arkansas are (ascending order) the Bachelor, St. Joe, and Boone Formations. These formations disconformably overlie Middle Ordovician to Upper Devonian strata and are overlain disconformably by ...
Manger, Walter L., Shanks, Jack L.
core   +2 more sources

Source analysis of quartz from the Upper Ordovician and Lower Silurian black shale and its effects on shale gas reservoir in the southern Sichuan Basin and its periphery, China

, 2019
Chao Han, Mei Han, Zaixing Jiang, Zuozhen Han, Hao Li, Zhigang Song, Wenjian Zhong, Kaixuan Liu, Chunhao Wang   +8 more
semanticscholar   +1 more source

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge, Castroviejo Bolibar, Ricardo, Pereira, Eurico, Rodrigues, Jose F., Tassinari, Colombo G.   +4 more
core   +2 more sources

Classification and logging identification of reservoir space near the upper Ordovician pinch-out line in Tahe Oilfield

Open Geosciences
Real drilling near the upper Ordovician pinch-out line in the Tahe Oilfield shows that the drilling encountered karst reservoir. However, due to the transitional position between the denudation area and the overlying area and the special karst geological
Yang Debin, Jin Yanlin, Zhang Juan, Xie Runcheng, Chen Huaxin, Yin Shuai, Cai Wenli   +6 more
doaj   +1 more source

HOLORHYNCHUS (PENTAMERIDA, BRACHIOPODA) IN THE UPPER ORDOVICIAN OF ESTONIA [PDF]

Proceedings of the Estonian Academy of Sciences. Geology, 1993
openaire   +1 more source

Organic matter accumulation under the Middle-Upper Ordovician tectonic transition on the western margin of the North China platform. [PDF]

Sci Rep
Li F, Zhang D, Huang Z, Chen X, Xie M, Zhang Q, Li F, Wang Q, Wang X, Liu W.   +9 more
europepmc   +1 more source

Evidence for cryptic molting behavior in the trilobite Toxochasmops vormsiensis from the Upper Ordovician Katian Kõrgessaare Formation, Estonia. [PDF]

Naturwissenschaften
Bicknell RDC, Vargas-Parra EE, Landman NH, Pärnaste H.   +3 more
europepmc   +1 more source