Results 31 to 40 of about 69,912 (302)

Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland [PDF]

, 2016
Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions.
Faggetter, Luke, FAGGETTER, LUKE E., Joachimski, Michael, JOACHIMSKI, MICHAEL M., NEWTON, ROBERT J., Pruss, Sara, PRUSS, SARA B., Raine, Robert, RAINE, ROBERT J., Smith, Paul, SMITH, PAUL M., SUN, YADONG, WIDDOWSON, MIKE, Wignall, P B, WIGNALL, PAUL B.   +14 more
core   +1 more source

Cambrian Trilobites [PDF]

Proceedings of the National Academy of Sciences, 1916
USNM ...
openaire   +2 more sources

Accessing Heart Health: A Northern Experience

Online Journal of Rural Nursing and Health Care, 2011
Background and Research Purpose: Coronary heart disease (CHD) continues to be a major cause of death and disability across the globe. Regional differences in CHD exist throughout Canada, including Ontario. It is important to explore the complex interplay
Katherine Timmermans, Ellen Rukholm, Isabelle Michel, Lisa Seto Nielsen, Jennifer Lapum, Robert P Nolan, Jan E Angus   +6 more
doaj   +1 more source

Research on Reservoir Characteristics and Main Controlling Factors of Longwangmiao Formation of Cambrian in Sichuan Basin

Frontiers in Earth Science, 2022
Based on the 4 measured profiles, 17 observation profiles, and 13 drilling core macroscopic and microscopic characteristics of the Cambrian Longwangmiao Formation in the Sichuan Basin, combined with analysis and testing, and reservoir logging ...
Qiang Wang, Qiang Wang, Xingzhi Wang, Xinyao Zeng   +3 more
doaj   +1 more source

An analogue of distributivity for ungraded lattices [PDF]

, 2005
In this paper, we define a property, trimness, for lattices. Trimness is a not-necessarily-graded generalization of distributivity; in particular, if a lattice is trim and graded, it is distributive.
Thomas, Hugh
core   +4 more sources

Carbon isotope composition and its evolution around the base of the Drumian Stage in Linzhou area, northern Henan

地质科技通报, 2022
Carbon isotope stratigraphy is an important means to subdivide and correlate the Cambrian strata. Based on the carbon isotope analysis of the carbonate strata of Lütuogou Section, northern Henan Province, it is found the δ13C value of carbonate samples ...
Yonglin Chen, Xi Wang, Yanhui Wang, Shuai Yao, Guodian Bai, Huaibin Fang   +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

Hydrocarbon accumulation conditions and main controlling factors of the Middle-Upper Cambrian Xixiangchi Group in the eastern Sichuan Basin

Shiyou shiyan dizhi, 2021
The petroleum geological elements and main controlling factors of the Middle-Upper Cambrian Xixiangchi Group in the eastern Sichuan Basin were systematically analyzed on the basis of geological outcrops and drilling data.
Ziming SUN, Wei SUN, Juanhua LIN, Qiang MA   +3 more
doaj   +1 more source

New data on geochemical features, fluid mode, age and potential ore content of granitoids of Isherim anticlinorium (North Ural)

Литосфера, 2018
Granitoids of Ishirim anticlinorium which is one of the major Precambrian structures of the North Urals, are poorly studied by modern geochemical and isotope-geochronological methods that led to the existence of different points of view on formation ...
Georg A. Petrov, Vladimir V. Holodnov, Yurii L. Ronkin   +2 more
doaj   +1 more source

Characterization of the length of structural fractures in low permeability reservoirs and its application: a case study of Longwangmiao Formation in Moxi-Gaoshiti areas, Sichuan Basin

Shiyou shiyan dizhi, 2022
In order to classify the quantitative characterization method of structural fracture length in low-permeability reservoirs, the Cambrian Longwangmiao Formation of Moxi-Gaoshiti areas in the Sichuan Basin is taken an example in this study.
Ke SUN, Ke XU, Qinghua CHEN
doaj   +1 more source