Results 101 to 110 of about 12,978 (245)
ABSTRACT Aim The Ediacaran Period (~635–538.5 Ma) records the initial rise and diversification of animals. While many studies have examined the evolving structure of these early animal communities, far fewer have examined evolving function. Here, we quantify change in functional diversity (i.e., the distribution of ecological traits within assemblages)
Matthew Craffey +3 more
wiley +1 more source
The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi +4 more
wiley +1 more source
Late Ediacaran Microfossils from Finland
Here we present a detailed accounting of organic microfossils from late Ediacaran sediments of Finland, from the island of Hailuoto (northwest Finnish coast), and the Saarijärvi meteorite impact structure (~170 km northeast of Hailuoto, mainland Finland).
Slater, Ben, +3 more
core +1 more source
Detrital provenance evolution of the Ediacaran-Silurian Nanhua foreland basin, South China
We report here in-situ U–Pb and Hf isotopic results of detrital zircons from sixteen Cambrian–Silurian siliciclastic samples across the Nanhua foreland basin, South China.
Li, Zheng-Xiang +8 more
core +1 more source
These findings confirm that the Campanian‐aged Bozbent Member turbiditic sequence in the Eastern Pontides was deposited in an extensional fore‐arc basin and therefore exhibits the petrographic and geochemical characteristics of passive margin sandstones.
Çiğdem Saydam Eker +6 more
wiley +1 more source
Base level fall driven by glacio‐isostatic rebound created a suite of migrating knickpoints on the Isle of Jura. Modelling knickpoint retreat rate with different models of erodibility based on rock strength data reveals that accounting for the contrast in bed load and bedrock strength best explains knickpoint retreat rate. Abstract Bedrock rivers are a
Adam G. G. Smith +3 more
wiley +1 more source
Reviewing the Ediacaran fossils of the Long Mynd, Shropshire [PDF]
The Precambrian fossils of the Long Mynd, Shropshire, are becoming increasingly important to studies of palaeoecology and evolution immediately prior to the 'Cambrian Explosion' of animal life.
Liu, Alexander G.
core
Macroscopic organisms are rare in the fossil record until the Ediacaran Period, beginning 635 million years ago. Here, Zhu et al. report the discovery of 1.56-billion-year-old carbonaceous compression fossils that provide evidence of the evolution of ...
Shixing Zhu +8 more
doaj +1 more source
Geophysical Investigation of a Thermal Field in Abu Dhabi, United Arab Emirates
Abstract In the Abu Dhabi Emirate, near Madinat Zayed and Liwa, studies have identified high geothermal gradients and high‐heat‐flow areas. Assessing the geothermal potential in this region requires a detailed mapping of subsurface geological formations and their thermal properties.
Hakim Saibi +3 more
wiley +1 more source
Modes of pre-Ediacaran multicellularity
A multicellular grade of organization is widely distributed among extant organisms and widely represented in the pre-Ediacaran fossil record. A review of the pre-Ediacaran record identifies nine general categories of multicellular organization: (1 ...
Butterfield, N. J.
core +2 more sources

