Results 141 to 150 of about 5,559,621 (201)
Some of the next articles are maybe not open access.
Sedimentology, 1996
ABSTRACTThe Late Cretaceous (late Cenomanian‐Campanian) Loma Chumico Formation consists of laminated to massive bedded siliceous shales, cherts, ash fall tuffs/volcanic glass beds and volcaniclastic sandstones. The Loma Chumico Formation is at least 630 m thick (core data) in the Tempisque Basin, and can be subdivided in the subsurface into organic ...
R. N. ERLICH +4 more
openaire +1 more source
ABSTRACTThe Late Cretaceous (late Cenomanian‐Campanian) Loma Chumico Formation consists of laminated to massive bedded siliceous shales, cherts, ash fall tuffs/volcanic glass beds and volcaniclastic sandstones. The Loma Chumico Formation is at least 630 m thick (core data) in the Tempisque Basin, and can be subdivided in the subsurface into organic ...
R. N. ERLICH +4 more
openaire +1 more source
Precambrian Research, 2019
Abstract The limestones of the Loma Negra Formation provide an excellent opportunity to examine the behaviour of rare earth elements plus yttrium (REY) due to the near-zero diagenetic alteration of the carbonate system. The terrigenous supply to this unit was minimal or scarce in relation to the depth of seawater in which the limestones accumulated ...
Gómez Peral, Lucia +3 more
openaire +2 more sources
Abstract The limestones of the Loma Negra Formation provide an excellent opportunity to examine the behaviour of rare earth elements plus yttrium (REY) due to the near-zero diagenetic alteration of the carbonate system. The terrigenous supply to this unit was minimal or scarce in relation to the depth of seawater in which the limestones accumulated ...
Gómez Peral, Lucia +3 more
openaire +2 more sources
Sedimentary Geology, 2023
Fil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales.
Di Pasquo Lartigue, Maria +1 more
openaire +2 more sources
Fil: Milana, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales.
Di Pasquo Lartigue, Maria +1 more
openaire +2 more sources
Journal of Geophysical Research: Solid Earth, 1993
The 1989 Loma Prieta, California, earthquake is characterized by the lack of major, throughgoing, coseismic, right‐lateral faulting along strands of the San Andreas fault zone in the epicentral area. Instead, throughout the Summit Ridge area there are zones of tension cracks and left‐lateral fracture zones oriented about N45°W, that is, roughly ...
Arvid M. Johnson, Robert W. Fleming
openaire +1 more source
The 1989 Loma Prieta, California, earthquake is characterized by the lack of major, throughgoing, coseismic, right‐lateral faulting along strands of the San Andreas fault zone in the epicentral area. Instead, throughout the Summit Ridge area there are zones of tension cracks and left‐lateral fracture zones oriented about N45°W, that is, roughly ...
Arvid M. Johnson, Robert W. Fleming
openaire +1 more source
2019
Abstract This article uses measurements from outcrops of the Point Loma Formation to define the hierarchical organization of a distributive submarine fan and spatial changes in its constituent parts. A four-tier hierarchy for lobes is documented: bed, element, complex, and system.
David R. Pyles +2 more
openaire +1 more source
Abstract This article uses measurements from outcrops of the Point Loma Formation to define the hierarchical organization of a distributive submarine fan and spatial changes in its constituent parts. A four-tier hierarchy for lobes is documented: bed, element, complex, and system.
David R. Pyles +2 more
openaire +1 more source
Cretaceous Research, 2019
Abstract Detailed sedimentological and stratigraphical studies were performed in the Pilmatue Member of the Agrio Formation at Loma La Torre area, to recognize orbital signals in the Valanginian–Hauterivian of the Neuquen Basin. Facies analysis allowed us to recognize 4 facies associations, interpreted as a mixed siliciclastic-carbonate ramp setting.
Diego A. Kietzmann, Sebastián M. Paulin
openaire +1 more source
Abstract Detailed sedimentological and stratigraphical studies were performed in the Pilmatue Member of the Agrio Formation at Loma La Torre area, to recognize orbital signals in the Valanginian–Hauterivian of the Neuquen Basin. Facies analysis allowed us to recognize 4 facies associations, interpreted as a mixed siliciclastic-carbonate ramp setting.
Diego A. Kietzmann, Sebastián M. Paulin
openaire +1 more source
Journal of Sedimentary Research, 1987
Abstract Previous petrologic study of sandstones from the Upper Cretaceous Point Loma Formation utilized methodology advocated by Folk (1974). In order to improve comparability with other provenance studies of Cretaceous sandstones in California, new modal data for sandstones from the Point Loma Formation were determined using the ...
openaire +1 more source
Abstract Previous petrologic study of sandstones from the Upper Cretaceous Point Loma Formation utilized methodology advocated by Folk (1974). In order to improve comparability with other provenance studies of Cretaceous sandstones in California, new modal data for sandstones from the Point Loma Formation were determined using the ...
openaire +1 more source
North American Journal of Aquaculture, 2010
Abstract The objectives of the research were to compare the efficacy of ProVale yeast beta-glucan (β-glucan) with that of a previously tested research-grade yeast β-glucan preparation when administered as an intraperitoneal (IP) injection and to also pilot test the effectiveness of ProVale yeast β-glucan as a feed additive for reducing ...
Nicole J Guselle +3 more
openaire +1 more source
Abstract The objectives of the research were to compare the efficacy of ProVale yeast beta-glucan (β-glucan) with that of a previously tested research-grade yeast β-glucan preparation when administered as an intraperitoneal (IP) injection and to also pilot test the effectiveness of ProVale yeast β-glucan as a feed additive for reducing ...
Nicole J Guselle +3 more
openaire +1 more source
Journal of Sedimentary Research, 2017
Abstract During steady-state weathering, the rate of removal of the exposed weathering zone is balanced by the rate of generation of mineralogically identical material through chemical weathering. As steady-state conditions prevail, the mineralogical and chemical composition of sediments derived from the weathering profile should be ...
MARCELO AZEVEDO +7 more
openaire +1 more source
Abstract During steady-state weathering, the rate of removal of the exposed weathering zone is balanced by the rate of generation of mineralogically identical material through chemical weathering. As steady-state conditions prevail, the mineralogical and chemical composition of sediments derived from the weathering profile should be ...
MARCELO AZEVEDO +7 more
openaire +1 more source
AAPG Bulletin, 1986
Macroinvertebrate fossils are best preserved in southern California Upper Cretaceous strata in the Point Loma Formation at Carlsbad, California. Large bulk-rock samples were removed from a construction site (now covered) that exposed the upper Point Loma at the Carlsbad Research Center.
openaire +1 more source
Macroinvertebrate fossils are best preserved in southern California Upper Cretaceous strata in the Point Loma Formation at Carlsbad, California. Large bulk-rock samples were removed from a construction site (now covered) that exposed the upper Point Loma at the Carlsbad Research Center.
openaire +1 more source