Results 141 to 150 of about 1,414,806 (426)

The Suffield Fault, Stark County, Ohio [PDF]

open access: yes, 1986
Author Institution: Department of Geology, The College of WoosterA ground-derived total intensity magnetic map of the Suffield fault, a western extension of the Transylvania fault zone, suggests a fault with a southwest dip of 80° or greater ...
MacWilliams, R. H., Root, S. I.
core  

Shifting baselines of coral‐reef species composition from the Late Pleistocene to the present in the Florida Keys

open access: yesThe Depositional Record, EarlyView.
We produced the first reconstruction of the coral species composition of MIS5d–a reefs in the Florida Keys and compared it with existing regional records from MIS5e, the Holocene, the recent past (1996) and the present (2022) to evaluate how Florida's reefs changed throughout the late Quaternary.
Lauren T. Toth   +3 more
wiley   +1 more source

Lacustrine and fan‐delta sediments in syn‐rift lake basins

open access: yesThe Depositional Record, EarlyView.
A consistent model for the sequence framework and depositional pattern of asymmetric half‐grabens in syn‐rift lake basins bounded by active faults has been established, complementing existing models for marine rift successions. Syn‐rift lake basins are characterised by relatively small dimensions, steep slopes, poorly developed shoreline strata ...
Qianyou Wang   +6 more
wiley   +1 more source

The concealed Caledonide basement of eastern England and the southern North Sea : a review [PDF]

open access: yes, 1995
Field mapping, analysis of borehole core and studies of geophysical potential field and seismic data can be used to demonstrate the existence of a number of distinct crustal blocks within Eastern Avalonia beneath eastern England and the southern North ...
England, R., Lee, Mick, Pharaoh, Tim
core   +1 more source

A clustering-based repeating earthquakes identification method and its application

open access: yes地球与行星物理论评
Events with highly similar waveforms and rupturing of the same fault patch are interpreted as repeating earthquakes, which can be applied in detecting deep fault deformation, characterizing fault behavior, and assess seismic hazards.
Yafen Huang   +4 more
doaj   +1 more source

Geochemical evaluation of black limestones in the Early Cretaceous platform carbonates of Gümüşhane (NE Turkey): An insight into petroleum source rock potential and palaeoenvironment conditions

open access: yesThe Depositional Record, EarlyView.
Some layers of limestone produce some hydrocarbons, and these hydrocarbons are removed from the fractures and cracks of the rock. The organic matter (OM) contained in the limestone is a mixture of terrestrial and marine OM and is thermally immature and mature.
Çiğdem Saydam Eker   +2 more
wiley   +1 more source

The Non-Organic Theory of the Genesis of Petroleum [PDF]

open access: yesarXiv, 1996
Recent advances in interdisciplinary fields as diverse as astrophysics, cosmogeophysics, nuclear geology, etc. have led to interesting developments in the non-organic theory of the genesis of petroleum. This theory, which holds that petroleum is of an abiogenic primordial origin, provides an explanation for certain features of petroleum geology that ...
arxiv  

Nature, origin and significance of a clayey cave deposit: Relationship between karst and Oligocene/Miocene tephra (NW Dinarides)

open access: yesThe Depositional Record, EarlyView.
A limestone cave in the NW Dinarides exhibits an anomalous presence of montmorillonite clay, not commonly found in surrounding caves, posing questions about its origin and age. Analysis reveals a composition similar to weathered tephra from the Smrekovec Volcanic Complex, suggesting transport by north‐east winds.
Nadja Zupan Hajna   +12 more
wiley   +1 more source

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