Frequency and sources of basin floor turbidites in alfonso basin, Gulf of California, Mexico: Products of slope failures

González-Yajimovich, Oscar; Gorsline, Donn S.; Douglas, Robert G.

doi:10.1016/j.sedgeo.2005.09.025

Cited by 19 publications

(31 citation statements)

References 7 publications

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“…Major faults on the southern section of the Baja California peninsula, as described by Coyan and others [17], are displayed on Google Earth imagery, with dots marking the downthrown blocks. The dashed line represents an unnamed buried fault inferred by previous studies [21,22]. The red dot marks our study site.…”

Section: Geologic Settingmentioning

confidence: 96%

“…Saltito's 14 km onshore rupture length corresponds to a magnitude (M) 6.5 earthquake [20]. Researchers working in the Bay of La Paz commonly identify a major buried fault along the western edge of the islands lying along the eastern edge of the bay [21,22]. The La Paz Basin is a half graben, controlled by the east-dipping Centenario Fault along its western edge [17].…”

Section: Geologic Settingmentioning

confidence: 99%

“…The La Paz Basin is a half graben, controlled by the east-dipping Centenario Fault along its western edge [17]. Although the majority of regional earthquakes occur along the spreading axes in the center of the Gulf of California, a number of earthquakes >5.0 M have occurred in the Bay of La Paz since 1900 [16,21,22], with magnitude 7.0 events having an estimated occurrence interval of ~1000 years [22]. Figure 1.…”

Section: Geologic Settingmentioning

confidence: 99%

“…Location of study site. Displayed on Google Earth imagery are (a); the Bay of La Paz, the city of La Paz, the Saltito Fault and the buried fault identified by [21,22] as occurring along the western flanks of the islands on the eastern edge of the bay. The area marked by the white square is expanded in (b); which displays the location of the two peninsulas surrounding Estero de Bahia Falso, our study site (white square) and the Pichilingue tidal gauge (red square).…”

Section: Geologic Settingmentioning

confidence: 99%

“…The bay is roughly oval with a maximum length of ~75 km N-S and 35 km E-W. The bay opens to the Gulf of California to the east, blocked in the south by several islands bounded on the west by an active fault [21,22], and a peninsula extending into the bay from the south (Figure 2a). The northern section of the bay is relatively deep, with a maximum depth of 420 m in the Alfonso Basin.…”

Section: Bay Of La Pazmentioning

confidence: 99%

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Geological and Sedimentological Evidence of a Large Tsunami Occurring ~1100 Year BP from a Small Coastal Lake along the Bay of La Paz in Baja California Sur, Mexico

McCloskey

Bianchette

Liu

2015

JMSE

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Abstract:The importance of small-scale seismic events in enclosed water bodies, which can result in large tsunami waves capable of affecting comprehensive damage over small, geographically-confined areas are generally overlooked, although recognizing the occurrence of such events is a necessary element in adequately assessing the risk of natural hazards at specific locations. Here we present evidence for a probable large localized tsunami that occurred within the Bay of La Paz, Baja California Sur, ~1100 year before present (BP), which resulted in the creation of a shelly ridge at an elevation of ~2 m above mean high water (MHW). This ridge consists of a continuous wedge of poorly mixed marine sands and shells ~50 cm in depth deposited along the entire seaward edge of the lake. The marine shells collected from terrestrial environments around the lake include species from a variety of environments, including offshore species with minimum preferred depths of >13 m. The evidence suggests that this material was likely deposited by a tsunami with a runup of 2-3.6 m above MHW, probably associated with the slumping of an island along the tectonically active eastern edge of the bay.

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Section: Geologic Settingmentioning

confidence: 96%

Section: Geologic Settingmentioning

confidence: 99%

Section: Geologic Settingmentioning

confidence: 99%

Section: Geologic Settingmentioning

confidence: 99%

Section: Bay Of La Pazmentioning

confidence: 99%

See 3 more Smart Citations

Geological and Sedimentological Evidence of a Large Tsunami Occurring ~1100 Year BP from a Small Coastal Lake along the Bay of La Paz in Baja California Sur, Mexico

McCloskey

Bianchette

Liu

2015

JMSE

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Volume and recurrence of submarine‐fan‐building turbidity currents

Jobe

Howes

Romans

et al. 2018

The Depositional Record

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Submarine fans are archives of Earth-surface processes and change, recording information about the turbidity currents that construct and sculpt them. The volume and recurrence of turbidity currents are of great interest for geohazard assessment, source-to-sink modelling, and hydrocarbon reservoir characterization. Yet, such dynamics are poorly constrained. This study integrates data from four Quaternary submarine fans to reconstruct the volume and recurrence of the formative turbidity currents. Calculated event volumes vary over four orders of magnitude (10 5 to 10 9 m 3 ), whereas recurrence intervals vary less, from 50 to 650 years.The calculated turbidity-current-event volume magnitudes appear to be related to slope position and basin confinement. Intraslope-fan deposits have small event volumes (ca 10 6 m 3 ) while ponded-fan deposits have very large event volumes

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Paleoclimate of the Gulf of California (Northwestern Mexico) During the Last 2000 Years

Martínez-López

Flores-Castillo

Saldívar-Lucio

et al. 2019

The Holocene and Anthropocene Environmental History of Mexico

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Frequency and sources of basin floor turbidites in alfonso basin, Gulf of California, Mexico: Products of slope failures

Cited by 19 publications

References 7 publications

Geological and Sedimentological Evidence of a Large Tsunami Occurring ~1100 Year BP from a Small Coastal Lake along the Bay of La Paz in Baja California Sur, Mexico

Geological and Sedimentological Evidence of a Large Tsunami Occurring ~1100 Year BP from a Small Coastal Lake along the Bay of La Paz in Baja California Sur, Mexico

Volume and recurrence of submarine‐fan‐building turbidity currents

Paleoclimate of the Gulf of California (Northwestern Mexico) During the Last 2000 Years

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