Excavation of Tommy Tucker Cave, Lassen County, California

1949 ◽  
Vol 14 (3) ◽  
pp. 203-214 ◽  
Author(s):  
Franklin Fenenga ◽  
Francis A. Riddell
Keyword(s):  
Sea Level ◽  
Great Basin ◽  
Hot Springs ◽  
Valley Floor ◽  
Fault Line ◽  
East Side ◽  
South Central ◽  
Cave Archaeology ◽  
The University

The following is a brief account of the partial excavation of a cave on the east side of Honey Lake Valley, near Wendel in Lassen County, California. Although the materials recovered are not extensive, these notes seem warranted by the fact that this is the only dry cave archaeology done south of Oregon on this extreme western periphery of the Great Basin. Ninety miles to the east, work has been done in Lovelock Cave and Humboldt Cave. Some 150 miles north of our area the University of Oregon, under the direction of L. S. Cressman, has devoted nearly seven years (1935–42) to excavating the dry caves of south-central Oregon.Honey Lake is the remnant of the westernmost arm of extinct Lake Lahontan. Its surface is 3,950 feet above sea level at the present time. The lake is bounded on the northeastern corner by Hot Springs Peak, a mountain of Miocene volcanics. Tommy Tucker Cave, circa 200 feet above the valley floor, is a fissure on a fault line near the foot of this peak.

Episodic earthquake swarms in the Mineral Mountains, Utah driven by the Roosevelt hydrothermal system

2021 ◽  
Author(s):  
Maria Mesimeri ◽  
Kristine Pankow ◽  
Ben Baker ◽  
J. Mark Hale
Keyword(s):  
Hydrothermal System ◽  
Hot Springs ◽  
Matched Filter ◽  
Earthquake Swarm ◽  
Earthquake Swarms ◽  
Earthquake Catalog ◽  
Spatial And Temporal Patterns ◽  
University Of Utah ◽  
South Central ◽  
The University

<p> The Mineral Mountains are located in south-central Utah within the transition zone from the Basin and Range to Colorado Plateau physiographic provinces, near the Roosevelt Hot Springs. First evidence of swarm-like activity in the area was found in 1981, when a six-station temporary network detected a very energetic swarm of ~1,000 earthquakes. More recently, in mid-2016, a dense local broadband seismic network was installed around the Frontier Observatory for Research in Geothermal Energy (FORGE) in southcentral Utah, ~10 km west of the Mineral Mountains. Beginning in 2016, the University of Utah Seismograph Stations detected, located, and characterized 75 earthquakes beneath the Mineral Mountains. In this study, we build an enhanced earthquake catalog to confirm the episodic swarm-like nature of seismicity in the Mineral Mountains. We use the 75 cataloged earthquakes as templates and detect 1,000 earthquakes by applying a matched-filter technique. The augmented catalog reveals that seismicity in the Mineral Mountains occurs as short-lived earthquake swarms followed by periods of quiescence. Earthquake relocation of ~800 earthquakes shows that activity is concentrated in a <2 km long E-W striking narrow zone, ~4 km east of the Roosevelt hydrothermal system. Two fault orientations, both N-S and E-W parallel to the Opal Mound and Mag Lee faults, respectively, are observed after computing composite focal mechanisms of highly similar earthquakes. After examining the spatial and temporal patterns of the best recorded earthquake swarm in October 2019, we find that a complex mechanism of fluid diffusion and aseismic slip is responsible for the swarm evolution with migration velocities reaching 10 km/day. We hypothesize that these episodic swarms in the Mineral Mountains are primarily driven by migrating fluids that originate within the Roosevelt hydrothermal system.</p>

Dating Late Pleistocene Pluvial Events and Tephras by Correlating Paleomagnetic Secular Variation Records from the Western Great Basin

1992 ◽  
Vol 38 (1) ◽  
pp. 46-59 ◽  
Author(s):  
Robert M. Negrini ◽  
Jonathan O. Davis
Keyword(s):  
Great Basin ◽  
Secular Variation ◽  
Hot Springs ◽  
Time Interval ◽  
Lake Basin ◽  
Lake Surface ◽  
Surface Level ◽  
Sedimentary Sequences ◽  
Tephra Layers ◽  
Geologic Record

AbstractPaleomagnetic records are used to correlate sedimentary sequences from pluvial Lakes Chewaucan and Russell in the western Great Basin. This correlation is the basis for age control in the relatively poorly dated sequence from Lake Chewaucan. The resulting chronology supports a lack of sedimentation in Lake Chewaucan during the interval 27,400 to 23,200 yr B.P., an assertion supported by the presence of a lag deposit at the corresponding stratigraphic horizon. Because the Lake Chewaucan outcrop (near Summer Lake, Oregon) is near the bottom of the lake basin, we conclude that Lake Chewaucan was at a lowstand during this time interval. The Chewaucan lowstand is coeval with the lowstand accompanying the Wizard's Beach Recession (isotope stage 3) previously seen in the geologic record from nearby pluvial Lake Lahontan. The ages of six tephra layers, including the Trego Hot Springs tephra, were also estimated using the paleomagnetic correlation. Together, the new age of the Trego Hot Springs tephra (21,800 yr B.P.) and the lake surface level prehistory of Lake Chewaucan imply a revised model for the lake surface level prehistory of Lake Lahontan. The revised model includes a longer duration for the Wizard's Beach Recession and the occurrence of a younger lowstand of short duration soon after the lowstand corresponding to the Wizard's Beach Recession.

scholarly journals Condensing Life Substances within the House: The Rice-Boiling Shuhi of Southwest China

2017 ◽  
Vol 71 (1) ◽  
Author(s):  
Elisabeth Hsu ◽  
Franz K. Huber ◽  
Caroline S. Weckerle
Keyword(s):  
Tibetan Plateau ◽  
Southeast Asia ◽  
High Altitude ◽  
Sea Level ◽  
Ethnic Groups ◽  
Southwest China ◽  
Cultural Practice ◽  
The Tibetan Plateau ◽  
Regional Culture ◽  
Fault Line

AbstractThe Shuhi of Muli County, Sichuan Province, are one of multiple ethnic groups inhabiting the river gorges of the Qinghai-Gansu-Sichuan corridor between the Tibetan plateau and the Chinese lowlands. The Shuhi have grown paddy rice since times immemorial at an unusually high altitude (ca. 2,300 m above sea level). This article aims to explain this conundrum not merely through the ecology (as is common among Tibetan area specialists), but by researching the cultivation and consumption of rice as a historically-evolved cultural practice. According to a recently formulated agro-archaeological hypothesis regarding the macro-region of Eurasia, it is possible to identify two supra-regional culture complexes distinguished by their respective culinary technologies: rice-boiling versus wheat-grinding-and-baking. The hypothesis posits that the fault line between the two supra-regional cultural complexes is precisely along this river gorges corridor. In this article we provide support for this hypothesis arguing that Shuhi ritual and kinship practices have much affinity with those of other rice-boiling peoples in Southeast Asia, whereas certain of their current religious practices are shared with the wheat-grinding Tibetans.

scholarly journals Research and Teaching as Actions Supporting the Specificity of a Territory: Developing a Design and Pedagogic Strategy for the Abandoned Mining Landscapes of Sardinia

2019 ◽  
Author(s):  
Pier Francesco Cherchi ◽  
◽  
Marco Lecis ◽  
Marco Moro ◽  
◽  
...  
Keyword(s):  
Joint Venture ◽  
The Political ◽  
Local Institutions ◽  
East Side ◽  
Research And Teaching ◽  
Academic Activities ◽  
Natural Landscapes ◽  
The University ◽  
The Relationship

This paper illustrates a case study of teaching and research applied to the abandoned mining landscapes of the Sulcis area, located in the south-east side of Sardinia, one of the poorest in Europe. Although the region’s critical condition in the present, the area is nevertheless extremely rich in fascination and history. It offers unique natural landscapes, mostly pristine, a variety of archeological sites and, as mentioned, the ruins of the mining installations. All of this makes fore-seeable a concrete possibility of regeneration for the area, based on tourism, one of the island primary resources. The local institutions of Sulcis started a partnership with the University of Cagliari aiming to pursuit not just a practical and economical outcome in the immediate present, more a cultural and deeper rescue with a wider perspective. In the following pages, we present our academic activities in this mark and how we managed to guarantee fruitful superpositions of pedagogy, design, and research in our work within this kind of cooperation.Our focus is, therefore, the relationship between researching and teaching activities and the actions in support of the territory, pursued in a joint venture with the political institution. During these experiences, we defined a strategy to intercross these different layers, bringing the real and concrete dimension into our classroom, sharing our work with the students, and, at the same time, transferring the fruits of the teaching experiences to the territory. The correspondence between these two levels is not free of ambiguity and contradictions, however, we are convinced that it might show very important and fruitful outcomes.

scholarly journals The New 4-m Millimeter Wave Telescope at Nagoya

1987 ◽  
Vol 115 ◽  
pp. 706-707
Author(s):  
K. Kawabata
Keyword(s):  
Sea Level ◽  
Millimeter Wave ◽  
Molecular Lines ◽  
The University

A new 4-m millimeter wave telescope has been constructed at the Department of Physics and Astrophysics, of Nagoya University, mainly for the purpose of making rapid surveys of interstellar molecular lines. The observing site is located on the Higashiyama Campus of the University at an altitude of 70-m above sea level in Nagoya. Observations with this telescope started in December 1983.

Trilobites from the upper part of the Deadwood Formation (Upper Franconian and Trempealeauan stages, Upper Cambrian), Black Hills, South Dakota

1997 ◽  
Vol 71 (1) ◽  
pp. 86-102 ◽  
Author(s):  
James H. Stitt ◽  
Wendy Metcalf Straatmann
Keyword(s):  
New Species ◽  
South Dakota ◽  
Sea Level ◽  
Great Basin ◽  
Black Hills ◽  
Upper Cambrian ◽  
Two New Species ◽  
Study Interval ◽  
Central Texas

Trilobites assigned to 29 genera and 39 species are reported from the Deadwood Formation in the Black Hills of South Dakota. Two new species, Prosaukia lochmani and Arcifimbria pahasapaensis, are described. Brachiopods are reported from the Taenicephalus Zone.A biostratigraphic zonation is established for the upper part of the Deadwood Formation. The Taenicephalus Zone in the lower part of the study interval is succeeded upsection by the Ellipsocephaloides Zone, both of which are assigned to the Franconian Stage. These two zones are overlain in turn by the Illaenurus and Saukia Zones of the Trempealeauan Stage. These zones are used to correlate this part of the Deadwood with coeval strata in Montana and Wyoming, central Texas, Oklahoma, and Alberta, Canada. The lowstand of sea level that occurred in the Great Basin at the time of the deposition of the Saukiella junia Subzone of the Saukia Zone probably extended eastward into the Black Hills, resulting in the absence of this fauna in the Black Hills.

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