Results 181 to 190 of about 2,024 (239)
Some of the next articles are maybe not open access.
POWGRAF2: a program for graphical spectral analysis in cyclostratigraphy
Computers & Geosciences, 2004Abstract Spectral analysis is a widely used statistical tool in cyclostratigraphy. The aim is to detect hidden periodicities in noisy temporal (or spatial) series derived from stratigraphic sequences at outcrops or boreholes. A graphical program to assist the geologist with the spectral analysis is presented in this paper.
Eulogio Pardo-Igúzquiza +1 more
openaire +1 more source
Cyclostratigraphy and the Astronomical Time Scale
Stratigraphy, 2007An important innovation in the International Geologic Time Scale 2004 is the use of astronomically forced stratigraphy, or cyclostratigraphy, to define geologic time over 0 to 23.03 Ma, much of it at an unprecedented resolution of 0.02 myr. In addition, ‘floating’ astronomical time scales with 0.10 to 0.40 myr resolution are defined for entire epochs ...
Linda A. Hinnov, James G. Ogg
openaire +1 more source
Testing Early Triassic timescales based on sulfur-isotope cyclostratigraphy
Geological Society of America BulletinThe distribution of time among the stages and substages of the ∼5-m.y.-long Early Triassic Epoch remains debated, with two competing chronological models: the short-Smithian timescale (∼0.5−1.2 m.y.), based mainly on radiometric dating of zircons, and ...
Lei Zhang +8 more
semanticscholar +1 more source
Geological Journal
The time reflected by the Milankovitch cycle is of great significance for determining the depositional time frames of strata. We utilized GR log curves to analyse the cyclostratigraphy of Sequence 1–Sequence 8. The results show that dating of sequences
Haitian Yu +4 more
semanticscholar +1 more source
The time reflected by the Milankovitch cycle is of great significance for determining the depositional time frames of strata. We utilized GR log curves to analyse the cyclostratigraphy of Sequence 1–Sequence 8. The results show that dating of sequences
Haitian Yu +4 more
semanticscholar +1 more source
2019
Cyclostratigraphy is an important tool for understanding astronomical climate forcing and reading geological time in sedimentary sequences, provided that an imprint of insolation from Earth’s orbital eccentricity, obliquity and/or precession is preserved (Milankovitch forcing).
Sinnesael, Matthias +4 more
openaire +1 more source
Cyclostratigraphy is an important tool for understanding astronomical climate forcing and reading geological time in sedimentary sequences, provided that an imprint of insolation from Earth’s orbital eccentricity, obliquity and/or precession is preserved (Milankovitch forcing).
Sinnesael, Matthias +4 more
openaire +1 more source
Earth-Science Reviews, 2019
Multiple proxies for paleoclimatic and paleoenvironmental change within sedimentary sequences have been developed; but understanding their relationships and their relative strengths or weaknesses are required to access a wealth of untapped paleoclimate ...
Mingsong Li +7 more
semanticscholar +1 more source
Multiple proxies for paleoclimatic and paleoenvironmental change within sedimentary sequences have been developed; but understanding their relationships and their relative strengths or weaknesses are required to access a wealth of untapped paleoclimate ...
Mingsong Li +7 more
semanticscholar +1 more source
Geological Society of America Bulletin
Waxing and waning of continental ice sheets on Gondwana during the late Paleozoic ice age induced high-magnitude eustatic sea-level fluctuations that have long been attributed to orbitally driven insolation variation and are recorded in mid-Mississippian
E. Stauffer, M.E. Smith, K. Vote
semanticscholar +1 more source
Waxing and waning of continental ice sheets on Gondwana during the late Paleozoic ice age induced high-magnitude eustatic sea-level fluctuations that have long been attributed to orbitally driven insolation variation and are recorded in mid-Mississippian
E. Stauffer, M.E. Smith, K. Vote
semanticscholar +1 more source
Evaluating the replicability in cyclostratigraphy
2022Cyclostratigraphy is the study of sedimentary cycles, i.e., patterns that are found to repeat themselves in the sedimentary geologic records. Those sedimentary cycles can be used to establish the chronology of the rocks’ formation in two ways: - by considering that given cycles are representative of the same geologic time in different records.
openaire +1 more source
Time-Series Analysis and Cyclostratigraphy
2003Increasingly environmental scientists, palaeoceanographers and geologists are collecting quantitative records of environmental changes (time-series) from sediments, ice cores, cave calcite, corals and trees. This book explains how to analyse these records, using straightforward explanations and diagrams rather than formal mathematical derivations.
openaire +1 more source