Results 111 to 120 of about 7,297 (224)

Late Ordovician to Early Silurian amalgamation of the Dalradian and adjacent Ordovician rocks in the British Isles

, 1986
From detailed radiometric and pressure-temperature estimates of the metamorphic history, uplift, and erosion of the Dalradian rocks of the British Isles, we find that 15–25 km of erosion took place mainly in Ordovician time.
Bluck, B. J., Leake, Bernard E.
core   +1 more source

Late Ordovician glacial record of the Anti-Atlas, Morocco [PDF]

, 2007
Late Ordovician glaciogenic deposits are exposed intermittently along an 800 km long outcrop belt in the Anti-Atlas mountains of southern Morocco. These deposits are of economic significance as potential oil-bearing sandstones in the Tindouf and Boudenib
Le Heron, Daniel Paul, Daniel Paul Le Heron, Le Heron, Daniel   +2 more
core   +1 more source

Epipelagic chitinozoan biotopes map a steep latitudinal temperature gradient for earliest Late Ordovician seas: Implications for a cooling Late Ordovician climate

, 2010
International audienceThe Early-Mid Ordovician has long been considered a super-greenhouse world, based largely on high relative global sea levels and light stable oxygen isotope data from bulk carbonates.
Armstrong, Howard-A., Williams, Mark, Paris, Florentin, Vandenbroucke, T.R.A., Al., Et   +4 more
core   +2 more sources

Novel Glomeromycotina–moss associations identified in California dryland biocrusts

New Phytologist, Volume 251, Issue 1, Page 151-163, July 2026.
Summary Drylands, which comprise c. 45% of Earth's land area, host biological soil crusts (biocrusts): symbiotic communities of cyanobacteria, fungi, algae, lichen, and bryophytes that stabilize soil and support key ecosystem functions. Moss‐dominated biocrusts are particularly interesting due to their potential to illuminate ancient bryophyte–fungal ...
Kian H. Kelly, Claudia Coleine, Chris Coshland, Jason E. Stajich   +3 more
wiley   +1 more source

High palaeolatitude (Hodh, Mauritania) recovery of graptolite faunas after the Hirnantian (end Ordovician) extinction event

Marine shales directly overlying lower Hirnantian (uppermost Ordovician) glacially related sediments in Mauritania (North-West Africa) have produced a rich graptolite fauna spanning the Ordovician-Silurian boundary in an area of high palaeolatitude.
Underwood, Charlie J., Ghienne, J.F., Deynoux, M.   +2 more
core  

A new Late Ordovician microdomatid gastropod genus from Seville, south west Spain, with a revision of Ordovician Microdomatoidea

, 2001
11 páginas.A new microdomatid gastropod, Eopagodea sevillana gen. and sp. nov., is described from the Late Ordovician (pre-Hirnantian Ashgill) limestones of Seville, Ossa Morena Zone, Spain.
Rohr, David M., Gutiérrez-Marco, J. C., Robardet, M., Frýda, Jiri   +3 more
core   +1 more source

Hyperspectral Fingerprinting of Dune Sediments Across the Arabian Peninsula: Insights Into Sediment Provenance and Transport Pathways From NASA's EMIT Data

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The Arabian Peninsula encompasses one of the world's most extensive aeolian systems, yet the provenance and transport history of its dune sediments are not well understood. Using hyperspectral data from NASA's Earth Surface Mineral Dust Source Investigation (EMIT), we mapped mineral compositions and abundance patterns across dune fields and ...
Ahmed Alshakr, Mohamed Sultan, Mustafa Kemal Emil, Hassan Alharbi, Fahad Alshehri, Abdullah A. Alotaibi, Abdullah T. Mohammad, Aylin Yildirim, Neil C. Sturchio   +8 more
wiley   +1 more source

Role of Unsaturated Zone on Aquifer Leakage–Assessed With Tidal Response

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Tidal response analysis is widely used to evaluate aquifer systems, but traditional models that neglect the unsaturated zone often underestimate groundwater leakage. This study develops a new analytical model for tidal analysis that incorporates unsaturated zone effects and explained leakage patterns that traditional models could not resolve ...
Guoliang Wang, Xiuyu Liang, Jiangwei Zhang, Huimin Mu, Chi‐Yuen Wang   +4 more
wiley   +1 more source

Late Ordovician and Early Silurian acritarchs

, 1988
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Late Ordovician palaeogeography and the positions of the Kazakh terranes through analysis of their brachiopod faunas

, 2017
Detailed biogeographical and biofacies analyses of the Late Ordovician brachiopod faunas with 160 genera, grouped into 94 faunas from individual lithotectonic units within the Kazakh Orogen strongly support an archipelago model for that time in that area.
Cocks, L. R. M., Leonid E. Popov, Robin M. Cocks, Popov, L. E.   +3 more
core   +1 more source