{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,29]],"date-time":"2026-01-29T04:04:35Z","timestamp":1769659475141,"version":"3.49.0"},"reference-count":72,"publisher":"Society of Exploration Geophysicists","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2012,3,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Depth imaging in ultrashallow (&amp;lt;50\u2009\u2009m) environments presents twofold challenge: (1) coda available for depth migration is very limited; and (2) conventional time processing with limited coda generally fails to estimate reliable velocity models for depth migration. We studied the combining of first-arrival traveltime inversion and prestack depth migration (PSDM) for depth imaging of ultrashallow paleochannel stratigraphy associated with the Bull Creek drainage system, Oklahoma. Restricted by a limited number of geophones (24) we acquired data for inversion and migration through two coincident profiles. The first profile for inversion has a wider survey-aperture (115-m maximum shot-receiver spacing) and consequently sparse CMP spacing (2.5\u00a0m), whereas the second profile for PSDM has denser CMP spacing (1\u00a0m) and consequently a narrower survey aperture (46-m maximum shot-receiver spacing). We also found that the velocity model from traveltime inversion of the wider-aperture data set is more preferable for depth-migration than the velocity model from time processing of the denser data set. The preferred depth image showed three episodes of incision whose chronological order is resolved through radio-carbon dating of terrace sediments. Results suggested that even with limited geophones, depth imaging of ultrashallow targets can be achieved by combining first-arrival traveltime inversion and PSDM through coincident wide- and narrow-aperture acquisitions.<\/jats:p>","DOI":"10.1190\/geo2011-0218.1","type":"journal-article","created":{"date-parts":[[2012,3,7]],"date-time":"2012-03-07T18:35:30Z","timestamp":1331145330000},"page":"B87-B96","source":"Crossref","is-referenced-by-count":5,"title":["Ultrashallow depth imaging of a channel stratigraphy with first-arrival traveltime inversion and prestack depth migration: A case history from Bull Creek, Oklahoma"],"prefix":"10.1190","volume":"77","author":[{"given":"Ammanuel","family":"Fesseha Woldearegay","sequence":"first","affiliation":[{"name":"Oklahoma State University 1 , Boone Pickens School of Geology, Stillwater, Oklahoma, . E-mail: ammanue@ostatemail.okstate.edu ; priyank.jaiswal@okstate.edu .","place":["USA"]}]},{"given":"Priyank","family":"Jaiswal","sequence":"additional","affiliation":[{"name":"Oklahoma State University 1 , Boone Pickens School of Geology, Stillwater, Oklahoma, . E-mail: ammanue@ostatemail.okstate.edu ; priyank.jaiswal@okstate.edu .","place":["USA"]}]},{"given":"Alexander R.","family":"Simms","sequence":"additional","affiliation":[{"name":"University of California at Santa Barbara 2 , Department of Earth Science, Santa Barbara, California, . E-mail: asimms@geol.ucsb.edu ; hanna02@umail.ucsb.edu .","place":["USA"]}]},{"given":"Hanna","family":"Alexander","sequence":"additional","affiliation":[{"name":"University of California at Santa Barbara 2 , Department of Earth Science, Santa Barbara, California, . E-mail: asimms@geol.ucsb.edu ; hanna02@umail.ucsb.edu .","place":["USA"]}]},{"given":"Leland C.","family":"Bement","sequence":"additional","affiliation":[{"name":"University of Oklahoma 3 , Oklahoma Archeological Survey, Norman, Oklahoma, . E-mail: Lbement@ou.edu .","place":["USA"]}]},{"given":"Brian J.","family":"Carter","sequence":"additional","affiliation":[{"name":"Oklahoma State University 4 , Department of Plant and Soil Sciences, Stillwater, Oklahoma, . 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