High-resolution marine seismic reflection data from the San Francisco Bay area

2000 ◽  
Author(s):  
Jonathan R. Childs ◽  
Patrick Hart ◽  
Terry R. Bruns ◽  
Michael S. Marlow ◽  
Ray Sliter
Keyword(s):  
High Resolution ◽  
San Francisco ◽  
Seismic Reflection ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Seismic Reflection Data ◽  
Bay Area ◽  
Reflection Data ◽  
Marine Seismic

A new system for acquisition and processing of very high‐resolution seismic reflection data

Geophysics ◽  
1990 ◽  
Vol 55 (8) ◽  
pp. 1036-1046 ◽  
Author(s):  
G. Lericolais ◽  
J. P. Allenou ◽  
S. Berné ◽  
P. Morvan
Keyword(s):  
High Resolution ◽  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
Sand Waves ◽  
Reflection Data ◽  
Seismic Data Acquisition ◽  
Using Data ◽  
Marine Seismic ◽  
Sediment Layers ◽  
Very High

A new digital seismic data acquisition system and accompanying software have been developed by Ifremer to replace the analog equipment commonly used in very high‐resolution (less than 1 m) shallow marine seismic reflection surveys. The acquisition part, based on a Hewlett‐Packard 9000 microcomputer, is capable of sampling rates of up to 15 kHz for one channel. Signal processing and image processing can be performed either during the survey by the acquisition computer or after the survey with a software system that runs on a Sun workstation. The system has been developed for the specific requirements of coastal studies; understanding of the sediment layers in such studies requires a vertical resolution of around 1 m in the top 10 m of sediment. This system has been successfully used for the study of subtidal sand waves off the Cherbourg peninsula (France). The results, which revealed the internal structure of sand waves from about 3 m to 8 m high, correlated well with synthetic seismograms that were created using data from core studies of the survey area.

Quaternary Transgressive/Regressive Cycles in the Gulf of Argos, Greece

1990 ◽  
Vol 34 (3) ◽  
pp. 317-329 ◽  
Author(s):  
Tjeerd H. van Andel ◽  
Eberhard Zangger ◽  
Constantine Perissoratis
Keyword(s):  
High Resolution ◽  
Sea Level ◽  
Seismic Reflection ◽  
Stratigraphic Sequence ◽  
Seismic Reflection Data ◽  
Marine Deposits ◽  
Reflection Data ◽  
Marine Seismic ◽  
Seismic Reflection Profiles ◽  
Mediterranean Soil

AbstractBorings in the Argive Plain reveal cycles of marine incursions, each ending with a Mediterranean soil profile and followed by a prograded fluvial and coastal wedge. The sediment prism of the Gulf of Argos shelf, visible in high-resolution seismic reflection profiles, also consists of transgressive and regressive depositional sequences identified by onlap, downlap, and truncation of deposits. At least four major reflectors, recognizable by their high acoustic impedance and erosional features, can be correlated across the shelf. The sediments between each pair of reflectors represent the seaward part of a set of transgressive and regressive marine deposits. They can be matched to the stratigraphic sequence on land where each marine unit is topped by a soil. Corrected for subsidence, the terminations of the onlapping and downlapping units define a local sea-level history; its time scale can be derived from a comparison with the eustatic sea-level history deduced from ocean cores. Thus, marine seismic reflection data can be used for the correlation of Quaternary oceanic and terrestrial chronologies.

A Qualitative Study of Ecstasy Sellers in the San Francisco Bay Area

2004 ◽  
Author(s):  
Sheigla Murphy ◽  
Paloma Sales ◽  
Micheline Duterte ◽  
Camille Jacinto
Keyword(s):  
Qualitative Study ◽  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Bay Area

Cyborg Jotería Pedagogies: Latinx Drag Queens Leveraging Communication Ecologies in the Age of the Digital and Social Displacement

2020 ◽  
Vol 14 (2) ◽  
pp. 44-66
Author(s):  
José Ramón Lizárraga ◽  
Arturo Cortez
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Digital Technologies ◽  
Physical World ◽  
Political Issues ◽  
Drag Queen ◽  
Bay Area ◽  
Online Presence ◽  
Drag Queens

Researchers and practitioners have much to learn from drag queens, specifically Latinx queens, as they leverage everyday queerness and brownness in ways that contribute to pedagogy locally and globally, individually and collectively. Drawing on previous work examining the digital queer gestures of drag queen educators (Lizárraga & Cortez, 2019), this essay explores how non-dominant people that exist and fluctuate in the in-between of boundaries of gender, race, sexuality, the physical, and the virtual provide pedagogical overtures for imagining and organizing for new possible futures that are equitable and just. Further animated by Donna Haraway’s (2006) influential feminist post-humanist work, we interrogate how Latinx drag queens as cyborgs use digital technologies to enhance their craft and engage in powerful pedagogical moves. This essay draws from robust analyses of the digital presence of and interviews with two Latinx drag queens in the San Francisco Bay Area, as well as the online presence of a Xicanx doggie drag queen named RuPawl. Our participants actively drew on their liminality to provoke and mobilize communities around socio-political issues. In this regard, we see them engaging in transformative public cyborg jotería pedagogies that are made visible and historicized in the digital and physical world.

Sign in / Sign up

Export Citation Format

Share Document