Results 181 to 190 of about 254,715 (432)

Quaternary stratigraphy and palaeogeography of Poland

open access: yes, 2016
Though the stratigraphical and palaeogeographical framework of the Quaternary in Poland is still to be completed, several crucial points have been confirmed recently.
L. Marks   +9 more
semanticscholar   +1 more source

Nature, origin and significance of a clayey cave deposit: Relationship between karst and Oligocene/Miocene tephra (NW Dinarides)

open access: yesThe Depositional Record, EarlyView.
A limestone cave in the NW Dinarides exhibits an anomalous presence of montmorillonite clay, not commonly found in surrounding caves, posing questions about its origin and age. Analysis reveals a composition similar to weathered tephra from the Smrekovec Volcanic Complex, suggesting transport by north‐east winds.
Nadja Zupan Hajna   +12 more
wiley   +1 more source

Geology of La Reforma caldera complex, Baja California, Mexico

open access: yesJournal of Maps, 2019
A new geological map at 1:50,000 scale of La Reforma Caldera Complex has been produced applying modern survey methodologies to volcanic areas. This map aims to represent a reliable and objective tool to understand the geological evolution of the region ...
L. García Sánchez   +20 more
doaj   +1 more source

Growth and form of the mound in Gale Crater, Mars: Slope-wind enhanced erosion and transport [PDF]

open access: yesarXiv, 2012
Ancient sediments provide archives of climate and habitability on Mars. Gale Crater, the landing site for the Mars Science Laboratory (MSL), hosts a 5 km high sedimentary mound. Hypotheses for mound formation include evaporitic, lacustrine, fluviodeltaic, and aeolian processes, but the origin and original extent of Gale's mound is unknown. Here we show
arxiv  

Mid‐Cretaceous calcarenite in stone products from the Roman colony of Emona, Regio X (modern Ljubljana, Slovenia)

open access: yesArchaeometry, Volume 65, Issue 1, Page 17-35, February 2023., 2023
Abstract Over the course of studying stone products from the Roman colony of Emona (Regio X), stratigraphically undefined calcarenite that was used to make simple sepulchral and architectural stone products was detected. The calcarenite used is late Aptian to early Cenomanian in age.
Rok Brajkovič   +5 more
wiley   +1 more source

The depression type of the Upper Visean-Serpukhovian succession in the Subpolar Urals

open access: yesЛитосфера, 2015
The Upper Visean-Serpukhovian deep-water shelf succession is described in the Subpolar Urals. Turbidite model of the sequence forming and direction of the carbonate material transport are proposed. The bioherm and shoal facial belt of the shelf margin is
D. B. Sobolev   +3 more
doaj  

Disturbance in the North Island of New Zealand: A case study using floodplain cores from the Coromandel to determine anthropogenic disturbance : A thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Geography Massey University, New Zealand [PDF]

open access: yes, 2016
It is well documented that following human occupation of a region, the surrounding environment may undergo drastic changes through vegetation pattern alterations, displacement of fauna, alteration of sedimentation and fluvial regimes, and changes to the ...
Fox, Elizabeth Grace
core  

Hotspots, trends, and regional focus on oil or gas exploration: A bibliometric comparative study

open access: yesDeep Underground Science and Engineering, EarlyView.
This paper explores the research trends in global oil and gas exploration through the bibliometric analysis of 3460 articles collected from the Web of Science database on oil and gas exploration published from 2013 to 2023. The research hotspots, objects, regional distribution, methods, and evaluation methods of oil and gas exploration are analyzed and
Jihong Wang   +3 more
wiley   +1 more source

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