Results 11 to 20 of about 83,753 (334)

LITHOLOGICAL AND FACIAL FEATURES, COMPOSITION, AND SEDIMENTATION CONDITIONS OF TERRIGENOUS-CARBONATE ROCKS OF THE MOTY GROUP (SHAMAN CLIFF, IRKUTSK REGION)

Геодинамика и тектонофизика, 2021
We have studied terrigenous-carbonate rocks in the area near the Sayan mountains in the Irkutsk Region (Russia), specifically at the Shaman Cliff, being the stratotype area of rocks that belong to the Moty group.
Z. L. Motova, A. V. Plyusnin, E. V. Nikulin   +2 more
doaj   +1 more source

Geological structure of Usol-Bilir reservoir, south-eastern boarder of the Kureiya Syneclise [PDF]

Нефтегазовая геология: Теория и практика, 2021
In the Cambrian interval, of the sedimentary section cover the junction zone of three large tectonic structures: the Nepa-Botuoba Anteclise, the Katanga Saddle, and the Kureiya Syneclise of the Eastern Siberian petroleum basin, four reservoir areals were
Mar'yanovich Yu.V
doaj   +1 more source

Distribution of Cambrian Source Rock Controlled by the Inherited Paleotopography on the Precambrian Basement in the Tarim Basin, NW China

Frontiers in Earth Science, 2022
The Cambrian source rock is a key indicator that will guide future hydrocarbon explorations in ultra-deep strata. Despite its importance, the characteristics of paleotopography on the Precambrian basement and the distribution of source rocks above it ...
Haowei Yuan, Haowei Yuan, Shuping Chen, Shuping Chen, Kun Dai, Xiaochen Guo, Linghua Kong, Nana Feng, Huaibo Zhao, Huaibo Zhao, Weili Yang   +10 more
doaj   +1 more source

Geochemistry of the black rock series of lower Cambrian Qiongzhusi Formation, SW Yangtze Block, China: Reconstruction of sedimentary and tectonic environments

Open Geosciences, 2021
The black rock series in the Qiongzhusi Formation contains important geochemical information about the early Cambrian tectonic and ecological environment of the southwestern Yangtze Block.
Liu Hao, Wang Chan, Li Yong, Deng Jianghong, Deng Bin, Feng Yuexing, Chen Hui, Xu Yunlong, Zhao Shaoze   +8 more
doaj   +1 more source

A possible case of inverted lifestyle in a new bivalved arthropod from the Burgess Shale [PDF]

Royal Society Open Science, 2019
The origin of the arthropod carapace, an enlargement of cephalic tergites, can be traced back to the Cambrian period. However, its disparity and evolution are still not fully understood.
Alejandro Izquierdo-López, Jean-Bernard Caron   +1 more
doaj   +1 more source

Morphology and relationships of the enigmatic stenothecoid pan-brachiopod Stenothecoides—new data from the middle Cambrian Burgess Shale Formation [PDF]

Acta Palaeontologica Polonica, 2021
Bulk sampling of middle Cambrian carbonate units in the lower Burgess Shale Formation (Wuliuan) and the upper Wheeler Formation (Drumian) in Utah have yielded abundant silicified stenothecoids.
PAUL A. JOHNSTON, MICHAEL STRENG
doaj   +1 more source

A modified trap design for sampling subterranean habitats for central Texas Eurycea salamanders [PDF]

Subterranean Biology
In this paper, we describe modifications to a sampling technique for surface, stream-dwelling salamanders for use in subterranean settings. Leaf litter bags are an effective and commonly used trap for salamanders, and their construction purposefully ...
Ryan M. Jones, Zachary C. Adcock, Andrew R. MacLaren, Kemble White IV   +3 more
doaj   +3 more sources

New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China [PDF]

Acta Palaeontologica Polonica, 2020
The fuxianhuiid arthropod Guangweicaris spinatus, from the lower Cambrian (Series 2, Stage 4), Guanshan Biota (Wulongqing Member, Canglangpu Formation), located in the vicinity of Kunming (Yunnan Province, southwest China), is redescribed based on new ...
Hong Chen, David A. Legg, Da-You Zhai, Yu Liu, Xian-Guang Hou   +4 more
doaj   +1 more source

Sedimentary characteristics and development model of Cambrian gypsum-salt rocks, Tarim Basin

Shiyou shiyan dizhi, 2021
The Cambrian gypsum-salt rocks in the Tarim Basin are key geological elements to the pre-salt play typical marine evaporites, yet little attention has been paid to this set of evaporites.
Qi FAN, Tailiang FAN, Qingping LI, Yang DU, Yan ZHANG, Yaxuan YUAN   +5 more
doaj   +1 more source

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P., Anthony E. Fallick, Anton B. Kuznetsov, Bowring S.A., Brand U., Brasier M.D., Brasier M.D., Brasier M.D., Burns S.J., Calver C.R., Corsetti F.A., Fairchild I.J., Fairchild I.J., Gao G., Gorokhov I.M., Gorokhov I.M., Gorokhov I.M., Grotzinger J.P., Grotzinger J.P., Hoffman P.F., Igor M. Gorokhov, Kaufman A.J., Kennedy M.J., Kirschvink J.L., Knoll A.H., Knoll A.H., Knoll A.H., Kupecz J.A., Kuznetsov A.B., Kuznetsov A.B., Lambert I.B., Magaritz M., McArthur J.M., McArthur J.M., McCulloch M.T., Melezhik V.A., Morton J.P., Ovchinnikova G.V., Pelechaty S.M., Podkovyrov V.N., Pokrovsky B.G., Pokrovsky B.G., Pokrovsky B.G., Saylor B.Z., Semikhatov M.A., Singh U., Smith L.H., Tronnes R.G., Tucker M.E., Tucker M.E., Veizer J., Veizer J., Victor A. Melezhik, Wada S.-I., Walter M.R., Wang Da-Rui   +55 more
core   +1 more source