{
"USGS Publications Warehouse": {
"@context": "https://schema.org",
"@type": "CreativeWork",
"additionalType": "Book",
"name": "Sequence stratigraphic framework of upper pliocene to holocene sediments of the Los Angeles Basin, California: Implications for aquifer architecture",
"identifier": [
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"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse IndexID",
"value": "70156831",
"url": "https://pubs.usgs.gov/publication/70156831"
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"propertyID": "USGS Publications Warehouse Internal ID",
"value": 70156831
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],
"inLanguage": "en",
"datePublished": "2015",
"dateModified": "2017-05-10",
"abstract": "Executive Summary\nGroundwater provides more than one-third of the municipal water supply for the coastal Los Angeles Basin and defining the aquifer architecture is a high priority for ground-water managers. Sequence stratigraphy,\nthe state-of-the-art method for delineating reservoir geometry and continuity in the petroleum industry, is now being incorporated into ground water resource assessments and environmental investigations. By\nevaluating subsurface data using sequence stratigraphy, the geometry and distribution of aquifer and aquitard sediments are linked to the original depositional processes that formed the sediments. Skyline Ridge, Inc.,\nthe U.S. Geological Survey (USGS), in cooperation with Los Angeles County Department of Public Works (LACDPW) and the Water Replenishment District of Southern California (WRDSC) completed an\ninvestigation of the Wilmington \u2013 Long Beach area by integrating data from new exploratory research boreholes, marine reflection seismic, vintage land reflection seismic, and high-resolution gravity measurements.\nSequence stratigraphy is shown to define pathways for saltwater intrusion into freshwater coastal aquifers by integrating preexisting data with (1) the new borehole observations and (2) structural and physical\nproperties data derived from the geophysical measurements.\nBy constructing a series of seismic reflection and well log cross sections (presented as sheets), this investigation further defines and delineates ten sequences of Late Pliocene to Holocene age in the Wilmington \u2013\nLong Beach area of the Los Angeles Basin. These sequences were first described by Ponti and others (2007), and the implications for sea water intrusion was discussed by Edwards and others (2009a). In addition,\nthis investigation presents regional seismic facies \u2013 environment of deposition maps for the five youngest sequences: 1) the Dominquez Sequence; 2) the Mesa Sequence; 3) the Pacific Sequence; the Harbor\nSequence; and 4) the Bent Spring Sequence.\nThe stratigraphic framework established in the Wilmington \u2013 Long Beach area is extended into the Central Basin of the greater Los Angeles area by utilizing 1980s and older vintage petroleum exploration land\nseismic reflection data. Tying this data to the available groundwater monitoring well network in the Central and West Coast Basins demonstrate aquifer correlation problems, and may provide insights into\nestablishing a more robust groundwater model for the greater Los Angeles Basin area.",
"description": "49 p.",
"publisher": {
"@type": "Organization",
"name": "Pacific Section, SEPM, Society for Sedimentary Geology"
},
"author": [
{
"@type": "Person",
"name": "Edwards, Brian D. bedwards@usgs.gov",
"givenName": "Brian D.",
"familyName": "Edwards",
"email": "bedwards@usgs.gov",
"affiliation": [
{
"@type": "Organization",
"name": "Pacific Coastal and Marine Science Center",
"url": "https://www.usgs.gov/centers/pacific-coastal-and-marine-science-center"
}
]
},
{
"@type": "Person",
"name": "Ponti, Daniel J. dponti@usgs.gov",
"givenName": "Daniel J.",
"familyName": "Ponti",
"email": "dponti@usgs.gov",
"identifier": {
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"propertyID": "ORCID",
"value": "0000-0002-2437-5144",
"url": "https://orcid.org/0000-0002-2437-5144"
},
"affiliation": [
{
"@type": "Organization",
"name": "Earthquake Science Center",
"url": "https://www.usgs.gov/centers/earthquake-science-center"
}
]
},
{
"@type": "Person",
"name": "Ehman, Kenneth D.",
"givenName": "Kenneth D.",
"familyName": "Ehman"
}
],
"funder": [
{
"@type": "Organization",
"name": "Pacific Coastal and Marine Science Center",
"url": "https://www.usgs.gov/centers/pacific-coastal-and-marine-science-center"
}
]
}
}