Zobrazeno 1 - 10
of 82
pro vyhledávání: '"David Bukry"'
Autor:
Linda E. Heusser, A. J. Wagner, David Bukry, Jason A. Addison, John A. Barron, Valerie Schwartz
Publikováno v:
Quaternary International. 621:74-83
Diatom, pollen, silicoflagellate, and biogenic opal analyses from a 155 cm-long gravity core from Pioneer Seamount, offshore Santa Cruz, California (PS1410-06 GC, latitude 37.3°N, longitude 123.4°W, water depth 2165 m) are compiled for the last ~11
A Holocene record of ocean productivity and upwelling from the northern California continental slope
Autor:
Linda E. Heusser, David Bukry, Jason A. Addison, Bruce P. Finney, Jennifer E. Kusler, Clark R. Alexander, John A. Barron
Publikováno v:
Quaternary International. 469:96-108
The Holocene upwelling history of the northern California continental slope is examined using the high-resolution record of TN062-O550 (40.9°N, 124.6°W, 550 m water depth). This 7-m-long marine sediment core spans the last ∼7500 years, and we use
Publikováno v:
Quaternary International. 469:109-119
Piston core TN062-O550, collected about 33 km offshore of Eureka, California, contains a high-resolution record of the climate and oceanography of coastal northernmost California during the past ∼7.34 kyr. Chronology established by nine AMS ages on
Publikováno v:
Geological Society of America Abstracts with Programs.
Publikováno v:
Marine Micropaleontology. 126:1-18
Diatom and silicoflagellate assemblages in cores EW0408-47JC, -47TC, -46MC (57° 34.5278′ N, 136° 3.7764′ W, 114 m water depth) taken from the outer portion of Slocum Arm, a post-glacial fjord in southeastern Alaska, reveal the paleoclimatic and
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 422:85-100
Eocene diatom and silicoflagellate biostratigraphy are summarized and correlated with the most recent geologic time scale as well as with the global oxygen isotope and eustatic sea level curves. The global distribution of Eocene diatom/silicoflagella
Autor:
Ray E. Wells, Richard M. Friedman, Peter J. Haeussler, Robert A. Duncan, David Bukry, J. L. Wooden, Douglas G. Pyle
Publikováno v:
Geosphere. 10:692-719
Siletzia is a basaltic Paleocene and Eocene large igneous province in coastal Oregon, Washington, and southern Vancouver Island that was accreted to North America in the early Eocene. New U-Pb magmatic, detrital zircon, and 40Ar/39Ar ages constrained
Publikováno v:
Marine Micropaleontology. 108:28-40
High-resolution studies of diatoms and silicoflagellates of the past 55 kyrs in cores MD02-2517/2515 from the central Gulf of California (GoC) reveal profound changes in GoC surface waters. Roperia tesselata, a diatom proxy for late winter–early sp
Publikováno v:
Quaternary International. 310:140-154
Diatoms and silicoflagellate assemblages were examined in two year-increments of varved samples spanning the interval from 1748 through 2007 in Santa Barbara Basin (SBB) box core SBBC0806 to determine the timing and impact of possible 20th century wa
Publikováno v:
Quaternary International. 215:34-44
Santa Barbara Basin (SBB) diatom and silicoflagellate assemblages are quantified from a box core record spanning AD 1940–2001 and an Ocean Drilling Program Hole 893A record from ∼220 BC to AD 1880. The combined relative abundance of the diatoms F