Results 151 to 160 of about 29,354 (302)

Formation process of the gravel‐dominated deposit from the 2011 Tohoku‐oki tsunami in Ofunato, northeastern Japan, inferred by integrating sedimentology and tsunami modelling

Sedimentology, EarlyView.
ABSTRACT Tsunami deposits serve as geological records of past events and are essential for understanding the occurrence and dynamics of tsunamis. However, conventional research has largely focused on sandy and boulder deposits, leaving gravel‐dominated tsunami deposits comparatively underexplored; furthermore, their characteristics and formation ...
Hidetoshi Masuda, Haruki Imura, Koki Nakata, Takashi Ishizawa, Daisuke Sugawara, Kazuhisa Goto   +5 more
wiley   +1 more source

Spherulite in the modern aragonitic travertine stromatolite has a calcite core with exopolymers

Sedimentology, EarlyView.
ABSTRACT Spherulites are spherical to ellipsoidal particles formed by various crystalline substances and can be abiotically synthesised in the laboratory. Among various spherulite types, spherulites composed of calcium carbonate are also found in various natural environments, but their abiotic or biotic origins are still controversial.
Fumito Shiraishi, Takayuki Akimoto, Naotaka Tomioka, Satoko Motai, Yoshio Takahashi   +4 more
wiley   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

Bed‐scale quantitative discrimination of hyperpycnites from intrabasinal turbidites—Results from a channelised slope system in the Upper Carboniferous Westward Ho! Formation, United Kingdom

Sedimentology, EarlyView.
ABSTRACT Features considered indicative of hyperpycnites and intrabasinal turbidites overlap. Outcrop study presented here suggests that the Westward Ho! Formation forms an 800 m high deepwater‐slope system dominated by hyperpycnites. Taking this unit, and other successions where hyperpycnites have been described, as having been deposited solely from ...
Tony Reynolds
wiley   +1 more source

Acide diaminopimélique libre des bivalves symbiotiques Free diaminopimelic acid in symbiotic bivalves

, 1995
International audienceL'analyse de la composition en acides aminés libres des tissus de plusieurs bivalves symbiotiques provenant des sites hydrothermaux sous-marins des Galapagos, de la fosse du Japon ou du prisme d'accrétion de la Barbade montre la ...
Fiala-Médioni, Aline, Boulègue, Jacques, Albéric, Patrick   +2 more
core   +1 more source

Exceptionally preserved embryos reveal maternal care in freshwater bivalves since the Cretaceous. [PDF]

Sci Rep
Delvene G, Lozano RP, Munt MC, Skawina A.   +3 more
europepmc   +1 more source

The effects of bioturbation on porewater chemistry and early marine diagenesis: Evidence from a modern intertidal zone in Abu Dhabi, U.A.E.

Sedimentology, EarlyView.
ABSTRACT Early marine carbonate cements generally form in CaCO3‐supersaturated seawater at the seabed or shallow burial depths, resulting in syn‐sedimentary cemented firmgrounds and hardgrounds. The processes controlling early marine diagenesis are complex, particularly in coastal environments where geochemistry is influenced by different water sources
Drew Brown, Tom Kibblewhite, Fiona Whitaker, Daniela Gutierrez‐Rueda, Daniel S. Alessi, John‐Paul Zonneveld, Murray Gingras, Hilary Corlett   +7 more
wiley   +1 more source

Recognition of fossil keratose sponges in carbonates using petrographic and machine‐learning classification

Sedimentology, EarlyView.
ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee, Seung‐Sep Kim, Cui Luo   +2 more
wiley   +1 more source

Gastropods and bivalves

, 2019
Buklets "Gliemeži un gliemenes" iepazīstina ar Latvijas Univeraitātes Muzeja Zooloģijas kolekcijās apskatāmajiem gliemežiem un gliemenēm, to veidiem, formām, un personām, kas šādas kolekcijas ir vākuši un dāvinājuši Latvijas Univeraitātes Muzejam ...
Rudzītis, Māris, Latvijas Universitātes Muzejs, Rudzīte, Mudīte   +2 more
core  

The role of dopamine in the life history of bivalves: a review. [PDF]

Front Zool
Nikishchenko V, Dyachuk V.
europepmc   +1 more source