D W McShea,D M Raup
D W McShea
The completeness of a sedimentary section of known timespan may be assessed qualitatively by comparing its thickness with the average accumulation for that timespan. Average accumulations may be estimated from sediment volume and continenta...
Paleosols and their relevance to Precambrian atmospheric composition: a discussion [0.03%]
古土壤及其对前寒武纪大气组成的启示：讨论文集
H D Holland,C R Feakes
H D Holland
Cycle anatomy and variability in the storm-dominated type cincinnatian (Upper Ordovician): coming to grips with cycle delineation and genesis [0.03%]
以风暴作用为主的辛辛那提安阶段（奥陶系上统）的成因旋回及变化：界定和探讨成因旋回的问题
S M Holland,A I Miller,B F Dattilo et al.
S M Holland et al.
Although parasequence and sequence are scale-independent terms, they are frequently applied only to specific scales of cycles. For example, meter-scale cycles are commonly assumed to be parasequences or PACs. In the Upper Ordovician Kope an...
J A Palmer,G N Phillips,T S McCarthy
J A Palmer
Various paleosols have been reported from within the Witwatersrand and Ventersdorp Supergroups, South Africa. They were studied in an attempt to constrain the amount of oxygen available in the atmosphere during deposition of the gold- and u...
J S Trefil,D M Raup
J S Trefil
Impact structures can be catalogued according to the age of the rocks in which they are now found ("country rocks"). The observed frequency distribution of craters by age of country rock is shown to be statistically indistinguishable from t...
J F Kasting,D H Eggler,S P Raeburn
J F Kasting
Current models predict that the early atmosphere consisted mostly of CO2, N2, and H2O, along with traces of H2 and CO. Such models are based on the assumption that the redox state of the upper mantle has not changed, so that volcanic gas co...
J P Grotzinger,J F Kasting
J P Grotzinger
The Precambrian record of carbonate and evaporite sedimentation is equivocal. In contrast to most previous interpretations, it is possible that Archean, Paleoproterozoic, and to a lesser extent, Meso to Neoproterozoic seawater favored surpl...
Abrupt climate change and transient climates during the Paleogene: a marine perspective [0.03%]
古新世气候的突变及过渡期气候：海洋相视角
J C Zachos,K C Lohmann,J C Walker et al.
J C Zachos et al.
Detailed investigations of high latitude sequences recently collected by the Ocean Drilling Program (ODP) indicate that periods of rapid climate change often culminated in brief transient climates, with more extreme conditions than subseque...
Major Element, REE, and Other Trace Element Behavior in Amphibolite Weathering under Semiarid Conditions in Southern India [0.03%]
半干旱条件下印度南部变粒岩风化过程中主量元素、稀土元素和其他微量元素的行为特征
A Sharma,V Rajamani V
A Sharma
A body of komatiitic amphibolite, an enclave within the Archean high-grade orthogneisses in southern India, shows mild chemical weathering under semiarid conditions. Along fractures, chemical weathering has advanced (Chemical Index of Alter...
Ultrahigh-Temperature Metamorphism in Madurai Granulites, Southern India: Evidence from Carbon Isotope Thermometry [0.03%]
印度南方马杜赖片麻岩的超高温变质作用：碳同位素温标证据
M Satish-Kumar
M Satish-Kumar
Ultrahigh-temperature (UHT) metamorphism in the Madurai Block of the southern Indian granulite terrain has been verified using the calcite-graphite isotope exchange thermometer. Carbon isotope thermometry has been applied to marbles from a ...