Results 101 to 110 of about 23,609 (212)

NUEVA FUENTE DE OBSIDIANA EN LA REGIÓN DE LA ARAUCANÍA, CENTRO-SUR DE CHILE: QUÍMICA Y CONTEXTO ARQUEOLÓGICO DE LA OBSIDIANA RIOLÍTICA NEGRA DE LOS NEVADOS DE SOLLIPULLI NEW OBSIDIAN SOURCE IN THE ARAUCANÍA REGIÓN (SOUTH CENTRAL CHILE): CHEMICAL AND ARCHAEOLOGICAL CONTEXT OF THE BLACK RIOLITIC OBSIDIAN FROM THE NEVADOS DE SOLLIPULLI

open access: yesMagallania, 2008
Un domo de obsidiana negra de composición riolítica aflora entre otras rocas volcánicas en la latitud 38.97716° sur y longitud 71.63528° oeste, en los Nevados de Sollipulli, al oeste del Volcán Sollipulli y al sur del pueblo de Melipeuco en el centro-sur
CHARLES R STERN   +3 more
doaj  

Relations between extensional tectonics and magmatism within the Southern Oklahoma aulacogen [PDF]

open access: yes
Variations in the geometry, distribution and thickness of Cambrian igneous and sedimentary units within southwest Oklahoma are related to a late Proterozoic - early Paleozoic rifting event which formed the Southern Oklahoma aulacogen.
Gilbert, M. C., Mcconnell, D. A.
core   +1 more source

Matrix effect and calibration strategy in trace element analysis of geological glasses using 193 nm excimer LA-ICP-MS [PDF]

open access: yes, 2011
SMP006-P01ポスター要旨 / 日本地球惑星科学連合2011年大会(2011年5月22日~5月27日, 幕張メッセ国際会議場 ...
CHANG, Qing   +3 more
core  

Relaxation in silicate melts [PDF]

open access: yes, 1990
Dingwell, Donald B., Webb, Sharon L.
core   +1 more source

U-Pb geochronology of the El Jadida rhyolite and relation to possible Lower Cambrian recycling (Coastal block, Moroccan Meseta). [PDF]

open access: yes, 2018
The El Jadida (Mazagan) dome, whose existence was reported as early as 1934 by Yovanovitch and Freys, constitutes one of the first outcrops of the Moroccan Meseta where the Precambrian (PIII?)-Paleozoic (Lower Cambrian?) boundary was established (Gigout,
El Attari, A.   +8 more
core  

Geology of the Northern Llano Uplift, Junction to Llano, Texas [PDF]

open access: yes, 2016
This year\u27s Texas Academy of Science Geology Field Trip will visit nine interesting locations in two different areas in the Texas Hill Country (Figure 1). In the first area we will look at the Cretaceous stratigraphy around Junction, Texas (Figures 1,
Barker, Chris, Nielson, R. LaRell
core   +1 more source

Preliminary evaluation of radar imagery of Yellowstone Park, Wyoming [PDF]

open access: yes
Evaluation of radar imagery of Yellowstone Park ...
Christiansen, R. L.   +3 more
core   +1 more source

Cenozoic sedimentary and volcanic rocks of New Zealand: A reference volume of lithology, age and paleoenvironments with maps (PMAPs) and database. [PDF]

open access: yes, 2015
This volume presents descriptive geological data and text about each Cenozoic sedimentary and volcanic geological unit to formation and member level (in some cases) exposed on land in New Zealand, including their lithology, stratigraphic age and inferred
Kamp, Peter J.J.   +2 more
core   +1 more source

Study of the lithology, petrology and rock chemistry for the Pyramid Mountains, New Mexico [PDF]

open access: yes
Rock and soil samples were collected at 24 sites within the Pyramid Mountains of southwestern New Mexico. The site locations are specified as 10-acre plots within the Section, Township, and Range land survey system. Hand specimen are described.
Grant, S. K.
core   +1 more source

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