Results 71 to 80 of about 58,048 (209)

Trench‐Parallel Fluid Migration and Its Transient Discharge in a Cold Subduction Zone Decoded by Geochemistry of Subducted Cherts

Geochemistry, Geophysics, Geosystems
The presence of fluid plays a critical role in controlling the fault slips and the seismogenesis in subduction zones. However, the origins and pathways of the fluid remain poorly understood.
Hanaya Okuda, Hitomi Mizuno, Takashi Sano, Akira Ijiri, Minoru Ikehara, Wataru Tanikawa, Asuka Yamaguchi   +6 more
doaj   +1 more source

An Early Caddoan Period Cremation from the Boxed Springs Mound Site (41UR30) in Upshur County, Texas, and a Report on Previous Archaeological Investigations [PDF]

, 2000
The Boxed Springs Mound site (41UR30) is one of three major Early Caddoan (ca. A.D. 900- t 200) multiple mound centers in the Sabine River basin of northeastern Texas, the others including the Jamestown (41SM54) and Hudnall-Pirtle (41RK4) sites upstream ...
Perttula, Timothy K., Walters, Mark, Wilson, Diane E.   +2 more
core   +1 more source

The Henry Chapman Site (41SM56) [PDF]

, 2008
In the mid-1950s, Sam Whiteside conducted excavations at the Henry Chapman site, his site P-5 (41SM56), on Prairie Creek in eastern Smith County, Texas, some 18 miles east of Tyler, Texas. Mr.
Walters, Mark
core   +1 more source

Fluorination of Silver Phosphate in Nickel Reaction Vessels for Triple Oxygen Isotope Analysis

Rapid Communications in Mass Spectrometry, Volume 40, Issue 7, 15 April 2026.
ABSTRACT Rationale Increasingly, more laboratories are measuring the triple oxygen isotope values of phosphate. Standardization is key to having good interlaboratory results. Here, we present the triple oxygen isotope values of a suite of standards using fluorination and compare them with previously reported triple oxygen isotope values. Methods Silver
Jordan A. G. Wostbrock, Drake Yarian, Isabella Chiaravalloti, Spencer R. Moller, Ruth E. Blake   +4 more
wiley   +1 more source

Provenance and geochemistry of exotic clasts in conglomerates of the Oligocene Torehina Formation, Coromandel Peninsula, New Zealand [PDF]

, 2003
Non-marine pebble to cobble conglomerates of the lower Torehina Formation (Oligocene) crop out along western Coromandel Peninsula and overlie, with strong angular discordance, continental-margin metasedimentary rocks (Manaia Hill Group) of Mesozoic (Late
Baker C. K., Ballance P. F., Black P. M., Dickinson W. R., Dix G. R., Dott R. H., Hayward B. W., Hochstein M. P., Hutchinson C. S., Kear D., Kear D., Kear D., King P. R., Kingma J. T., Laird M. G., Nelson C. S., Skinner D. N. B., Skinner D. N. B., Skinner D. N. B., Surdam R. C.   +19 more
core   +2 more sources

Rethinking Collinearity in Self‐Organizing Maps: Evidence From Geophysical Data Classification

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract This study examines the impact of collinearity on unsupervised machine learning algorithms (UMLAs), specifically Self‐Organizing Maps (SOMs), for detecting lithological boundaries in geophysical data. Using a multi‐scale experimental framework that includes bivariate isotropic clusters, geologically complex Noddy simulations, and real‐world ...
Limin Xu, Leonardo Feltrin, Eleanor C. R. Green   +2 more
wiley   +1 more source

Syn-thrusting polygonal normal faults exposed in the hinge of the Cingoli anticline, northern Apennines, Italy

Frontiers in Earth Science, 2015
The Cingoli arcuate anticline is part of the Apennines fold-thrust belt in Italy. The anticline involves sedimentary carbonate strata generally affected by syn-thrusting contractional structures such as bed-normal pressure solution seams, folds, and ...
Lorenzo ePetracchini, Lorenzo ePetracchini, Marco eAntonellini, Andrea eBilli, Davide eScrocca   +4 more
doaj   +1 more source

Analysis of Artifacts from a 2010 Surface Collection at the Pace McDonald Site (41AN51), a Probable Middle Caddo Mound Center in Anderson County, Texas [PDF]

, 2011
The Pace McDonald site (41AN51) is a prehistoric Caddo mound center on Mound Prairie Creek in Anderson County, Texas, in the upper Neches River Basin. With the permission of one of the landowners, Mr.
Nelson, Bo, Perttula, Timothy K., Walters, Mark   +2 more
core   +1 more source

Splay Fault Permeability Governs Fluid–Structure Interaction in Accretionary Wedges

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Interactions between upper plate deformation and plate interface seismicity in subduction zones remain poorly understood, but growing evidence indicates that fluid flow along splay faults modulates upper‐plate faulting. Field observations from two exhumed splay faults define end‐member scenarios where impermeable faults trap fluids in their ...
Joaquin Julve, Åke Fagereng, Giovanni Toffol, Kohtaro Ujiie   +3 more
wiley   +1 more source

Chert exploitation and circulation in eastern Lombardy (Northern Italy): a diachronic overview through prehistory

UISPP Journal, 2021
This work focuses on the Eastern Lombardy Prealps (central Southern Alps), including the Brescia and Bergamo provinces. Knappable lithic raw materials are represented by cherts and radiolarites which are quite common in the Jurassic-Cretaceous ...
Stefano Bertola, Domenico Lo Vetro, Paolo Schirolli, Federico Confortini, Matteo Malzanni, Pasquino Pellecchi   +5 more
doaj   +1 more source