Results 31 to 40 of about 20,360 (229)

Low geomagnetic field strength during End-Cretaceous Deccan volcanism and whole mantle convection

open access: yesScientific Reports, 2020
Knowledge about long-term variation of the geomagnetic dipole field remains in its nascent stage because of the paucity of reliable experimental data over geological periods. Here, we present the first robust experimental data from the largest Cretaceous
Radhakrishna T.   +3 more
doaj   +1 more source

Paleomagnetism, rock magnetism and geochemical aspects of early Cretaceous basalts of the Paraná Magmatic Province, from Misiones, Argentina [PDF]

open access: yes, 2006
The basalts of the Posadas Formation were extruded during the huge continental volcanism that affected the Parana Basin in the Lower Cretaceous. We have carried out a paleomagnetic and rock-magnetic study on samples collected along a basalt outcrop ...
Lagorio, Silvia Leonor   +2 more
core   +1 more source

Petrogenesis of paleocene flood basalt sequence and interlayered sedimentary successions in the Mannar Basin – Offshore Sri Lanka (Northern Equatorial margin of the Indian Ocean)

open access: yesEvolving Earth
The Mannar Basin is a rift basin formed during the breakup of Gondwana, comprising sedimentary deposits from multiple cycles. Exploration for hydrocarbons has uncovered igneous sequences distributed throughout the basin's sedimentary sequences.
S. Karunarathne   +6 more
doaj   +1 more source

Evidence for Compact Dark Matter in Galactic Halos [PDF]

open access: yes, 1999
Clumped dark matter arises naturally within the framwork of generic cosmological dark matter models. Invoking the existence of dark matter clumps can also solve may unexplained mysteries in astrophysics and geology or geophysics, eg.
Abbas, A., Abbas, S., Mohanty, S.
core   +4 more sources

The pyroclastic komatiite complex at Sattasvaara in northern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1985
The Sattasvaara komatiite complex is part of an extensive zone of explosive komatiitic volcanism which may have been a significant stage in the Lapponian evolution regarded as Archean.
M. Saverikko
doaj   +1 more source

Tracing δ18O and δ2H in Source Waters and Recharge Pathways of a Fractured-Basalt and Interbedded-Sediment Aquifer, Columbia River Flood Basalt Province

open access: yesGeosciences, 2021
The heterogeneity and anisotropy of fractured-rock aquifers, such as those in the Columbia River Basalt Province, present challenges for determining groundwater recharge.
David Behrens   +7 more
doaj   +1 more source

High-resolution calcareous nannofossil biostratigraphy and facies of Nimar Sandstone Formation (Bagh Group), central India and its bearing on Oceanic Anoxic Event 2

open access: yesJournal of the Palaeontological Society of India, 2023
It is proposed to consider Narmada Valley Late Cretaceous sequences in three sectors with proper selection of stratotype in each sector: Eastern Sector: comprising of Lameta group of rocks with type area in Jabalpur area, essentially laid down in ...
Syed A. Jafar
doaj   +1 more source

Dike Propagation During Global Contraction: Making Sense of Conflicting Stress Histories on Mercury

open access: yesFrontiers in Earth Science, 2021
Thrust fault-related landforms, smooth plains units, and impact craters and basins have all been observed on the surface of Mercury. While tectonic landforms point to a long-lived history of global cooling and contraction, smooth plains units have been ...
Kelsey Crane, Allison Bohanon
doaj   +1 more source

Archaeological Damage Assessment in Conflict Zones: Integrating Satellite Imagery and Ground Surveys in Daraa, Syria

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem   +5 more
wiley   +1 more source

The eruption characteristics of the Tarim flood basalt [PDF]

open access: yes, 2012
Integration of field investigation, regional stratigraphic comparison, remote sensing and image interpretation allow us to divide the Tarim Permian flood basalt province into three eruptive cycles listed by decreasing age; Kupukuziman flood basalt (KP ...
Guan, Ping   +4 more
core  

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