Results 71 to 80 of about 18,619 (157)

Some new palynomorphs from the Silurian of the Quetame Massif, Cordillera Oriental, Colombia, South America

open access: yesBoletín Geológico, 1994
During a palynological investigation of Paleozoic series in the Colombian Cordillera Oriental Silurian-indicating fossils were found in Colombia. In this paper we describe four palynomorphs which were significant for the Silurian of the Quetame Massif.
Klaus F. Prossl, Joachim R. Grosser
doaj   +1 more source

Catchment Hysteresis From Pathway Branching and Storage Trapping: A Two‐Parameter Mittag‐Leffler Closure and Its Application to the Great Catchment Hysteresis Challenge

open access: yesHydrological Processes, Volume 40, Issue 10, October 2026.
Answering the great catchment hysteresis challenge, we derive a catchment closure whose memory kernel follows from counting flow pathways and measuring how long water is detained. Applied to four Cumbrian micro‐catchments, it shows that the observed hysteresis index conflates event retention with genuine memory, and separating them weakens the inferred
Farrukh A. Chishtie
wiley   +1 more source

Paleomagnetism of the Scourie Dykes, Lewisian Foreland, NW Scotland: Constraints on Early Paleoproterozoic Paleogeography of Kenorland

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The Scourie dyke swarm in the Lewisian foreland of northwest Scotland provides key constraints on the Paleoproterozoic evolution of the North Atlantic craton. High‐precision U‐Pb geochronology identifies two distinct intrusive phases at ∼2.41–2.38 Ga and ∼2.00 Ga.
M. Mirzaei   +4 more
wiley   +1 more source

Fracture characteristics and stress disturbance analysis for well optimization of Silurian in Shunbei area, central Tarim Basin

open access: yesShiyou shiyan dizhi
The complex tectonic stress in the Shunbei area of the central Tarim Basin results in varied patterns of multilayered fractures. When drilling into the Silurian fracture zone and the formation pressure is lower than the drilling fluid column pressure ...
Laiyuan WANG   +4 more
doaj   +1 more source

New results of paleomagnetic studies of red-colored Silurian deposits

open access: yesГеофизический журнал, 2014
New results of paleomagnetic studies of red-colored rocks of the Late Silurian of southwestern Ukraine (Podolian area, the Dniester river basin) have been presented.
E. Polyachenko   +6 more
doaj   +1 more source

Silurian bedrock geology of the Muncie area

open access: yes, 1980
The Silurian rocks in Delaware County, Indiana, include, in ascending order, the Salamonie Dolomite, Limberlost Dolomite, Waldron Formation, and Louisville Limestone, and Mississinewa Shale Member of the Wabash Formation, all of the Niagaran Series ...
Glasby, Virginia June
core  

Acritarchs of Llandeilo and Caradoo age from classic localities in Britain. [PDF]

open access: yes, 1979
The last two decades have seen the publication of a large number of papers dealing with Palaeozoic acritarchs including many devoted to the description of Ordovician assemblages.
Turner, Robert Eric
core   +1 more source

Hydrocarbon Accumulation Controls in the Upper Sinian–Lower Silurian, Laoshan Uplift, South Yellow Sea Basin, China

open access: yesJournal of Marine Science and Engineering
Despite complex geological conditions and limited exploration activity, the South Yellow Sea Basin has not yet yielded a commercial hydrocarbon discovery.
Yinguo Zhang   +6 more
doaj   +1 more source

Lithological and biostratigraphic characteristics of the Upper Silurian and Lower Devonian deposits of the southwestern part of the field named after Roman Trebs

open access: yesGeoresursy, 2018
A conodont sequence from the Przhidolian stage of the Upper Silurian and almost the entire Lokhkovian stage of the Lower Devonian has been established in the sections of the Upper Silurian-Lower Devonian on the southwestern part of the field named after ...
Т.М. Mavrinskaya   +2 more
doaj   +1 more source

Silurian fossils from South Wales

open access: yes, 2018
Silurian fossils from South ...
Philippe Gil de Mendonça
core   +1 more source

Home - About - Disclaimer - Privacy