Results 121 to 130 of about 62,665 (270)

Population and herbarium genomics provide a comprehensive framework for a revision of Microcoleus (Cyanobacteria)

Journal of Phycology, EarlyView.
Abstract Microcoleus is a cosmopolitan, filamentous cyanobacterium and a key component of biological soil crusts—complex microbial communities essential for primary production in diverse terrestrial environments. Here, we performed a taxonomic revision of several species of Microcoleus based on a large population genomic dataset.
Svatopluk Skoupý, Aleksandar Stanojković, Jeffrey R. Johansen, Dale A. Casamatta, Callahan McGovern, Anne D. Jungblut, Jutta Fastner, Petr Dvořák   +7 more
wiley   +1 more source

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

The Sedimentary Distribution and Evolution of Middle Jurassic Reefs and Carbonate Platform on the Middle Low Uplift in the Chaoshan Depression, Northern South China Sea

Journal of Marine Science and Engineering
The Chaoshan Depression, situated in the northern South China Sea, is a Mesozoic residual depression beneath the Cenozoic Pearl River Mouth Basin. Borehole LF35-1-1 has confirmed the existence of marine Jurassic layers rich in organic carbon within this ...
Ming Sun, Hai Yi, Zhongquan Zhao, Changmao Feng, Guangjian Zhong, Guanghong Tu   +5 more
doaj   +1 more source

The Boundary Between Middle and Upper Jurassic [PDF]

Geological Magazine, 1956
The wisdom of placing the middle Jurassic-upper Jurassic boundary at the Callovian-Oxfordian line (rather than between the Bathonian and Callovian), as was done in Arkell9s recent book "Jurassic geology of the world" is questioned (by Melville) and reconfirmed (by Arkell).
openaire   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source

Fascinating single‐cell red algae: models for evolution and adaptation

New Phytologist, EarlyView.
Summary The unicellular red algae, Cyanidiophyceae, that diverged early during Archaeplastida (algal and plant) evolution, occupy a variety of extreme habitats that are inhospitable for most other eukaryotes. With the use of modern genomics and genetics methods, Cyanidiophyceae show a remarkable taxonomic diversity, share haplodiplophasic life cycles ...
Frédéric Berger, Debashish Bhattacharya, Chung Hyun Cho, Seok‐Wan Choi, Julia Van Etten, Shunsuke Hirooka, Tzu‐Yen Huang, Kyle J. Lauersen, Yongsung Lee, Shao‐Lun Liu, Shin‐ya Miyagishima, Stephen D. Rader, Daniel Schubert, Hwan Su Yoon   +13 more
wiley   +1 more source

Hydrogeochemical processes and groundwater chemistry in the West Siberia

Geology, Ecology, and Landscapes
The present study aimed to identify the formation factors of the current hydrogeochemical character of the Middle-Jurassic aquifer groundwaters (beds YU 2–4) in the Lyaminsky petroleum district of West Siberia in Russia.
Rimma N. Abdrashitova, Yulia S. Salnikova, Galina S. Bozhenkova, Andrey A. Ponomarev, Mikhail D. Zavatsky, Alena M. Bulasheva   +5 more
doaj   +1 more source

No legacy effects of severe drought on carbon and water fluxes in a Mediterranean oak forest

Plant Biology, EarlyView.
A Mediterranean Quercus ilex forest was severely affected by a drought in 2017 but fully recovered in the following year, supported by favourable weather and growing conditions both before and after the event. Abstract Severe droughts affect vegetation through several processes, such as hydraulic failure, early leaf senescence, depletion of carbon ...
S. Heinrich, X. Yu, J.‐M. Limousin, C. Werner, A. Bastos, A. Hoek van Dijke, S. Walther, J. Kroll, R. Orth   +8 more
wiley   +1 more source

Early Middle Jurassic magnetostratigraphy from Iberian sections

Journal of Iberian Geology
Abstract New magnetostratigraphic data are presented from four well-dated Iberian sections (Fuentelsaz, Cerro Méndez, Sierra de Lúgar and Puerto Escaño, from the Iberian Ranges and the Betic Cordillera) covering the Toarcian–Aalenian and Bajocian–Bathonian boundaries.
Osete López, María Luisa, Gómez, J. J., Osete, C., Palencia Ortas, Alicia, Villalaín, J. J., Ureta Gil, María Soledad, Gialanella, P., Sandoval, J., Goy Goy, Antonio   +8 more
openaire   +2 more sources

Microbial mats in dinosaur ichnocoenoses

Sedimentology, EarlyView.
ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke, Paul C. Murphey, Roger C. Buntin, Martin G. Lockley   +3 more
wiley   +1 more source