John Barron, Ph.D.
John is a Scientist Emeritus with the Geology, Minerals, Energy, and Geophysics Science center in Menlo Park, CA.
John is a marine micropaleontologist (diatoms) with expertise in and biostratigraphy and paleoceanography. His biostratigraphic expertise extends from the Late Cretaceous to the Holocene, with an emphasis on the North Pacific, eastern equatorial Pacific, and Southern Ocean. John's paleoclimate expertise is mostly on the Holocene of the North Pacific, ranging from the Gulf of California to the Gulf of Alaska. As an Emeritus Research Geologist, his research is directed toward developing and comparing Holocene sea surface temperature records in these eastern North Pacific regions with hydroclimate records in western North America and suggesting links.
Professional Experience
2012- 2016 (June) - Project Chief, Pacific Ocean Climate Variability: Effects on North American Precipitation Patterns Project, Climate and Land Use Change, Research & Development Program
1995-1997 – Project Chief: Pliocene, Research, Interpretation, and Synoptic Mapping(PRISM), Global Change & Climate History Program, Volcano Hazards Team, Menlo Park
1984-1995 – Project Chief and micropaleontologist of various USGS biochronology projects providing support to USGS mapping projects, Paleontology & Stratigraphy Branch
1974-1983 –Micropaleontolgist (diatoms), Paleontology & Stratigraphy Branch
Scientific Cruise Experience
Deep Sea Drilling Project (Leg 57-Japan; 63 (California margin; 85 (eastern equatorial Pacific); micropaleontologist
Ocean Drilling Project 119 (Antarctic margin, Indian Ocean; Co-Chief Scientist), 145 (North Pacific transect, micropaleotologist).
Education and Certifications
1969 BS (Geology), University of California, Los Angeles
1974 PhD (Geology), University of California, Los Angeles
Honors and Awards
2011 - The Brady Medal of the Micropalaeological Society (UK)
1994 - U.S. Dept. of Interior Meritorious Service Award
1986 - Charles Schuchert Award - from the Paleontological Society for excellence and promise in paleontology for scientists under 40 years old
Science and Products
A description of dredge samples collected in 1982 from the Bering Sea continental margin west of Navarin Basin
Paleoceanographic implications of Miocene deep-sea hiatuses
Latest Oligocene through early middle Miocene diatom biostratigraphy of the eastern tropical Pacific
Paleotemperature oscillations in the Middle and Late Miocene of the northeastern Pacific.
Diatom biostratigraphy and paleoecology of the type section of the Luisian Stage, central California
Widespread Miocene deep-sea hiatuses: Coincidence with periods of global cooling
North Pacific Late Miocene correlations using microfossils, stable isotopes, percent CaCO3, and magnetostratigraphy
Age, mineralogy, physical properties, and geochemistry of dredge samples from the Bering Sea continental margin
Composition and correlation of bedrock and sediment cores, R/V Sea Sounder cruise S3-79-SC, May 1979, California continental borderland
Neogene sedimentation on the outer continental margin, southern Bering Sea
New biostratigraphic results of dredging and dart coring in the western Gulf of Alaska and their tectonic implications
Biostratigraphic results of dart-coring in the western Gulf of Alaska, and their tectonic implications
Science and Products
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Filter Total Items: 114
A description of dredge samples collected in 1982 from the Bering Sea continental margin west of Navarin Basin
No abstract available.AuthorsMichael S. Marlow, T.L. Vallier, A. K. Cooper, J.A. Barron, F.H. WingatePaleoceanographic implications of Miocene deep-sea hiatuses
Miocene paleoceanographic evolution exhibits major changes resulting from the opening and closing of passages, the subsequent changes in oceanic circulation, and development of major Antarctic glaciation. The consequences and timing of these events can be observed in variations in the distribution of deep-sea hiatuses, sedimentation patterns, and biogeographic distribution of planktic organisms.ThAuthorsG. Keller, J.A. BarronLatest Oligocene through early middle Miocene diatom biostratigraphy of the eastern tropical Pacific
Study of DSDP Sites 71, 77, and 495 has allowed the development of a refined diatom biostratigraphy for the latest Oligocene through early middle Miocene of the eastern tropical Pacific which is well correlated to the low-latitude zonations for planktonic foraminifers, coccoliths, and radiolarians. Six zones and 7 subzones are proposed, and correlation with high-latitude diatoms zonations for theAuthorsJ.A. BarronPaleotemperature oscillations in the Middle and Late Miocene of the northeastern Pacific.
The paleoclimatic and paleoceanographic history has been studied in a N-S transect encompassing DSDP Site 173, the Newport Beach surface section, and DSDP Site 470, based on quantitative diatom and planktic foraminiferal analyses. Fourteen cold and 12 warm events that show close agreement with other microfossil studies as well as oxygen isotope records from low-latitude Pacific sites have been ideAuthorsJ.A. Barron, G. KellerDiatom biostratigraphy and paleoecology of the type section of the Luisian Stage, central California
Diatoms from the type section of the Luisian Stage in central California correlate with the lowermost part of the Denticulopsis lauta Zone through the lower part of subzone "a" of the Denticulopsis hustedtii-D. lauta Zone and are early Middle Miocene in age (about 6.0 to 14.0 Ma), Rocks assigned to the Luisian Stage by benthic foraminifers elsewhere in California exhibit little diachroneity in terAuthorsJack G. Baldauf, John A. BarronWidespread Miocene deep-sea hiatuses: Coincidence with periods of global cooling
High-resolution biostratigraphic analyses of Miocene deep-sea cores reveal eight intervals of widespread hiatuses in the world ocean at 23.0–22.5, 20.0–18.0, 16.0–15.0, 13.5–12.5, 12.0–11.0, 10.0–9.0, 7.5–6.2, and 5.2–4.7 m.y. ago. In complete sections these hiatuses correspond to intervals of cool faunal and floral assemblages, rapid enrichment of δ18O, and sea-level regressions. These factors suAuthorsJ.A. Barron, G. KellerNorth Pacific Late Miocene correlations using microfossils, stable isotopes, percent CaCO3, and magnetostratigraphy
A multidisciplinary approach to stratigraphy based on magnetostratigraphy, stable isotopes, percent CaCO3 and microfossils provides a framework for paleoclimatic and paleoceanographic reconstruction of the equatorial and North Pacific. A high-resolution biochronologic time scale has been achieved through integration of diatom, radiolaria, coccolith and planktic foraminifer datum levels with directAuthorsG. Keller, J.A. Barron, L.H. BurckleAge, mineralogy, physical properties, and geochemistry of dredge samples from the Bering Sea continental margin
No abstract available.AuthorsD.M. Jones, M.J. Kingston, M. S. Marlow, A. K. Cooper, J.A. Barron, F.H. Wingate, R.E. ArnalComposition and correlation of bedrock and sediment cores, R/V Sea Sounder cruise S3-79-SC, May 1979, California continental borderland
No abstract available.AuthorsJ.G. Vedder, R.E. Arnal, J.A. Barron, David Bukry, J.K. Crouch, Florence Lee-WongNeogene sedimentation on the outer continental margin, southern Bering Sea
Neogene sedimentary rocks and sediments from sites on the outer continental margin in the southern Bering Sea and on the Alaska Peninsula are dominated by volcanic components that probably were eroded from an emergent Aleutian Ridge. A mainland continental source is subordinate. Most sediment in the marine environment was transported to the depositional sites by longshore currents, debris flows, aAuthorsT.L. Vallier, M. B. Underwood, J.V. Gardner, J.A. BarronNew biostratigraphic results of dredging and dart coring in the western Gulf of Alaska and their tectonic implications
No abstract available.AuthorsPatrick H. McClellan, Michael A. Fisher, John A. Barron, Robert E. Arnal, Stanley A. Kling, George C. MooreBiostratigraphic results of dart-coring in the western Gulf of Alaska, and their tectonic implications
Age determinations are reported for microfossils from 56 dart-cores collected in 1978 from the Kodiak shelf. The ages suggest that rocks cropping out along Albatross Bank, at the shelf edge, are as old as middle or late Miocene, and that the anticline forming Albatross Bank, previously defined with multi- and single-channel seismic records, plunges northeastward in the sampled area. ForaminifAuthorsPatrick H. McClellan, R.E. Arnal, J.A. Barron, Roland E. von Huene, M. A. Fisher, G. W. Moore - News