Results 71 to 80 of about 34,448 (232)
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 +5 more
wiley +1 more source
Fault Slip and Exhumation History of the Willard Thrust Sheet, Sevier Fold‐Thrust Belt, Utah: Relations to Wedge Propagation, Hinterland Uplift, and Foreland Basin Sedimentation [PDF]
, 2019 Zircon (U‐Th)/He (ZHe) and zircon fission track thermochronometric data for 47 samples spanning the areally extensive Willard thrust sheet within the western part of the Sevier fold‐thrust belt record enhanced cooling and exhumation during major thrust ...
Barber, D. E. +5 more
core +2 more sources
Confirming the impact origin of the São Miguel do Tapuio structure, northeastern Brazil
Meteoritics &Planetary Science, EarlyView.Abstract The São Miguel do Tapuio structure (SMT) is a remarkable, nearcircular feature of about 21 km diameter, centered at 5°37.6′ S, 41°23.3′ W in Piauí state, northeastern Brazil. The structure is located within the sedimentary strata of the Paleozoic–Mesozoic Parnaíba Basin and predominantly comprises sandstones of the Devonian Pimenteiras and ...
Alvaro Penteado Crósta +9 more
wiley +1 more source
The stages of сalcareous Algae development in the Urals during Devonian
Литосфера, 2015 The article highlights the following stages of the development microscopic Devonian Algae in the Urals: the rise of Algae in the early Devonian (Karpinski time), degradation of Algae flora during the end of Early Devonian (taltiysk time), the Middle ...
A. L. Anfimov
doaj +2 more sources
Geophysical investigation of the Santa Marta impact structure—Piauí State, Brazil
Meteoritics &Planetary Science, EarlyView.Abstract The Santa Marta impact structure in northeastern Brazil, recognized as a partially preserved complex crater, was investigated through an integrated geophysical study employing magnetotelluric (MT) and gravity methods. Our research provides constraints on the crater's subsurface architecture.
Elienara Vasconcelos +5 more
wiley +1 more source
Gas exchange and pulmonary stress variations during SCUBA and breath‐hold diving in open seawater
The Journal of Physiology, EarlyView.Abstract figure legend Healthy, trained divers were studied before, during and after diving in open seawater with different techniques. SCUBA divers (diving to 15 or 40 m with air; cycling at depth) and breath‐hold divers (BHDs; sled‐assisted dives to 15, 25 or 40 m) underwent underwater and surface arterial blood gas (ABG) sampling.
Matteo Paganini +11 more
wiley +1 more source
A geological fence diagram for England and Wales [PDF]
, 2012 This report contains a brief description of the data and methodology used to compile the National Geological Fence Diagram (NGFD). The NGFD comprises a network of intersecting geological cross-sections covering England and Wales, to a minimum depth of
Ambrose, K. +7 more
core
Models of Inquiry-based Science Outreach to Urban Schools [PDF]
, 2004 NOTE: This is a large file, 15.5mb in size! A primary obstacle to urban precollege geoscience education is limited access to inquiry-based geoscience experiences that are engaging and relevant to students' lives.
core +1 more source
Geological Time Capsule Part I [PDF]
This brief review of Earth history starts with the Archeozoic Period and goes through the Devonian Period. It explains time divisions and that the basic unit of geologic time is the period, which comprises two or more epochs, and that an era consists of ...
core
The concealed Caledonide basement of eastern England and the southern North Sea : a review [PDF]
, 1995 Field mapping, analysis of borehole core and studies of geophysical potential field and seismic data can be used to demonstrate the existence of a number of distinct crustal blocks within Eastern Avalonia beneath eastern England and the southern North ...
England, R., Lee, Mick, Pharaoh, Tim
core +1 more source