James D. Gleason
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View article: Insight into climate and hydrology of the late cretaceous western interior basin from clumped isotope Paleothermometry and strontium isotopes
Insight into climate and hydrology of the late cretaceous western interior basin from clumped isotope Paleothermometry and strontium isotopes Open
View article: IODP Expedition 354, Hole U1450B - Well Logging Data
IODP Expedition 354, Hole U1450B - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: IODP Expedition 354, Hole U1450B - Well Logging Data
IODP Expedition 354, Hole U1450B - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: IODP Expedition 354, Hole U1453A - Well Logging Data
IODP Expedition 354, Hole U1453A - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: IODP Expedition 354, Hole U1453A - Well Logging Data
IODP Expedition 354, Hole U1453A - Well Logging Data Open
Logging data are measurements of physical properties of the formation surrounding a borehole, acquired in situ after completion of coring (wireline logging) or during drilling (Logging-While-Drilling, LWD). The range of data (resistivity, …
View article: Mercury isotopic composition of the Eocene Arctic Ocean: No evidence for volcanic loading signal at the PETM?
Mercury isotopic composition of the Eocene Arctic Ocean: No evidence for volcanic loading signal at the PETM? Open
A review of mercury abundances and isotopic compositions in Arctic Ocean marine sediments [1], including the 56 Ma PETM, is placed in the context of recent studies.The Cenozoic Arctic Ocean dataset, representing a variety of depositional e…
View article: Atmospheric dust flux in northeastern Gondwana during the peak of the late Paleozoic ice age
Atmospheric dust flux in northeastern Gondwana during the peak of the late Paleozoic ice age Open
The silicate mineral fraction of shallow marine carbonates archives dust contributions to the Central Persian Terranes along the northeastern margin of Gondwana (∼30ºS paleolatitude), enabling reconstruction of atmospheric dust loading and…
View article: Ostrich eggshell bead strontium isotopes reveal persistent macroscale social networking across late Quaternary southern Africa
Ostrich eggshell bead strontium isotopes reveal persistent macroscale social networking across late Quaternary southern Africa Open
Significance Hunter-gatherers like the Ju/’hoãnsi (!Kung) San use exchange networks to dampen subsistence and reproductive risks, but almost nothing is known of how, when, and why such practices emerged. Strontium isotope analysis of one p…
View article: Biogenic carbonate mercury and marine temperature records reveal global influence of Late Cretaceous Deccan Traps
Biogenic carbonate mercury and marine temperature records reveal global influence of Late Cretaceous Deccan Traps Open
View article: Author Correction: Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan
Author Correction: Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan Open
View article: Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan
Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan Open
The Himalayan-sourced Ganges-Brahmaputra river system and the deep-sea Bengal Fan represent Earth’s largest sediment-dispersal system. Here we present detrital zircon U-Pb provenance data from Miocene to middle Pleistocene Bengal Fan turbi…
View article: IODP Expedition 354 Scanning electron microscope images
IODP Expedition 354 Scanning electron microscope images Open
Microscopic images of discrete samples were acquired using a scanning electron microscope (SEM) and captured as image files. These files were uploaded along with a brief description and a record of the microscopic conditions when the image…
View article: IODP Expedition 354 Titration
IODP Expedition 354 Titration Open
Various chemical constituents (most commonly chloride) were measured by titration using either an autotitrator (chloride) or a manual titrator (other compounds). Chloride was measured by ion-selective electrode and a silver nitrate titrati…
View article: IODP Expedition 354 Section-half images
IODP Expedition 354 Section-half images Open
Digital section images were taken of the flat face of split cores on the Section Half Imaging Logger (SHIL) using a linescan camera at a resolution of 20 lines/mm (50 micron pixels). Cores were imaged as soon as possible after splitting to…
View article: IODP Expedition 354 Hole drilling summary
IODP Expedition 354 Hole drilling summary Open
Report includes detailed drilling data: BHA length, bit parameters, and primary depth measurements.
View article: IODP Expedition 354 P-wave velocity logger (whole round)
IODP Expedition 354 P-wave velocity logger (whole round) Open
P-wave velocity data were measured on whole-round sections on the Whole-Round Multisensor Logger (WRMSL) using pairs of piezoelectric transducers mounted on a caliper system. Measurements may be affected by degassing of pore fluid and micr…
View article: IODP Expedition 354 Hole drilling summary
IODP Expedition 354 Hole drilling summary Open
Report includes detailed drilling data: BHA length, bit parameters, and primary depth measurements.
View article: IODP Expedition 354 Laser height profile (section half)
IODP Expedition 354 Laser height profile (section half) Open
Height profile data were measured on the Section Half Multisensor Logger (SHMSL) by a rangefinding laser and recorded in uncorrected height units in millimeters in CSV files.
View article: IODP Expedition 354 Hole summary
IODP Expedition 354 Hole summary Open
Report lists hole data: location, water depth, drilling, coring system, and core recovery.
View article: IODP Expedition 354 Magnetic remanence (SRM-discrete)
IODP Expedition 354 Magnetic remanence (SRM-discrete) Open
Raw data files for the magnetic remanence measurements of discrete and section-half samples on the superconducting rock magnetometer (SRM-DISC and SRM-SECT) are stored on by hole and by expedition, and are designated as discrete samples, s…
View article: IODP Expedition 354 Magnetic susceptibility (point or contact system)
IODP Expedition 354 Magnetic susceptibility (point or contact system) Open
Magnetic susceptibility was measured on section halves on the Section Half Multisensor Logger (SHMSL) using a Bartington MS2 meter and either a MS2E or MS2K probe. Because all JRSO cores meet minimum size requirements for these two probes,…
View article: IODP Expedition 354 Alkalinity and pH
IODP Expedition 354 Alkalinity and pH Open
Alkalinity was determined by Gran titration with an autotitrator (Metrohm 794 basic Titrino) using 0.1 M HCl at 20 degrees C. Report includes alkalinity, correction factor (if applicable), and pH.
View article: IODP Expedition 354 Natural gamma radiation
IODP Expedition 354 Natural gamma radiation Open
Natural gamma radiation (NGR) data in the ~0.1 to 3.0 MeV range were measured using eight custom-designed sodium iodide (thallium) [NaI(Tl)] detectors arranged along the core measurement axis at 20 cm intervals. The NGR system uses layers …
View article: IODP Expedition 354 Ion chromatography
IODP Expedition 354 Ion chromatography Open
Cation and anion concentration in interstitial water samples was measured by ion chromatography using a conductivity detector. Cation analytes include calcium, magnesium, potassium, and sodium. Anion analytes include chloride, sulfate, and…
View article: IODP Expedition 354 Sample report
IODP Expedition 354 Sample report Open
Report includes detailed information about samples taken for testing: location/depth, type/form factor, test, request number, and database identifier.
View article: IODP Expedition 354 X-ray diffraction (XRD)
IODP Expedition 354 X-ray diffraction (XRD) Open
X-ray diffraction (XRD) is used to identify minerals and their proportions in sediment or hard rock sample powders on a Bruker AXS D4 Endeavor X-ray diffractometer. Results are returned as diffractograms in a viewable format (either PDF or…
View article: IODP Expedition 354 Photomicrographs
IODP Expedition 354 Photomicrographs Open
Microscopic images of discrete samples were acquired using stereo and upright light microscopes and captured on digital cameras. Image files were uploaded along with a brief description and a record of the microscopic and lighting conditio…
View article: Site U1451
Site U1451 Open
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View article: IODP Expedition 354 Magnetic remanence (SRM-longcore)
IODP Expedition 354 Magnetic remanence (SRM-longcore) Open
Magnetic remanence was measured on section halves (and rarely on whole-round sections) using a 2G Enterprises 760R cryogenic magnetometer, first as natural remanent magnetization (NRM) and then after demagnetization steps were performed on…
View article: IODP Expedition 354 Micropaleontology
IODP Expedition 354 Micropaleontology Open
Paleontological data were collected using microscopes and recorded in the JRSO description software. All data for a species group (e.g., diatoms or nannofossils) were collected in a Microsoft Excel worksheet by hole. A zip file of the enti…