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Late Cretaceous volcaniclastic rocks at DSDP Holes 74-525A and 74-528
Volcaniclastic rocks of Late Cretaceous age occur in four out of five sites (525, 527, 528, 529) drilled on the crest and the northwest flank of the Walvis Ridge during Leg 74.... -
Major and trace elements at DSDP Leg 74 Holes
Deep Sea Drilling Project Leg 74 drilled basement on the Walvis Ridge at Sites 525, 527, and 528. These sites are located on the crest and flanks of the segment of the Ridge... -
General descriptions, organic contents and ratios of geolipid components at D...
Two samples of Miocene sediments from Site 525 and four samples of sediments ranging in age from Pleistocene to Miocene from Site 528 have been analyzed for concentrations of... -
Major and trace elements and Nd and Sr isotope geochemistry of basalts at DSD...
Basement intersected in Holes 525A, 528, and 527 on the Walvis Ridge consists of submarine basalt flows and pillows with minor intercalated sediments. These holes are situated... -
Chemical profiles in sediment and basalt at DSDP Hole 74-525A
Forty sediment and four basement basalt samples from DSDP Hole 525A, Leg 74, as well as nine basalt samples from southern and offshore Brazil, were subjected to instrumental... -
Interstitial water chemistry at DSDP Leg 74 Holes
Interstitial water studies from sites drilled during a transect of the Walvis Ridge indicate that concentration increases in calcium and decreases in magnesium toward and into... -
Geochemistry at DSDP Leg 74 Holes
Clay mineralogical and inorganic geochemical data from the Campanian to the Pleistocene provide information bearing on the evolution of both continental and marine... -
Age models, accumulation rates, sand and carbonates at DSDP Leg 74 holes
Accumulation rates for the five sites drilled during Leg 74 of the Glomar Challenger are presented on a common timescale based on calibration of datum levels to paleomagnetic... -
Oxygen and carbon isotopes from benthic and planktonic foraminifers at DSDP L...
Oxygen and carbon isotope measurements have been made in picked planktonic and benthonic foraminifers from the five sites drilled on Leg 74, covering the whole Cenozoic. For the... -
Planktonic foraminifer abundance and estimated sea surface temperatures and s...
Two hydraulic piston cores containing the total Quaternary suite were analyzed quantitatively in their planktonic foraminiferal contents. For the Early Pleistocene, the... -
Geochemistry of Walvis Ridge basalts
The proposed origins for the Enriched Mantle I component are many and various and some require an arbitrary addition of an exotic component, be it pure sediment or an enriched... -
Benthic foraminifera and stable isotope composition in Paleocene-Eocene sedim...
In the late Paleocene to early Eocene, deep sea benthic foraminifera suffered their only global extinction of the last 75 million years and diversity decreased worldwide by... -
Organic geochemistry from different DSDP Holes in the subtropical South Atlan...
Organic matter has been characterized in samples of Pleistocene, Pliocene, and Miocene sediments from seven Deep Sea Drilling Project sites in the subtropical South Atlantic... -
Stable oxygen and carbon isotope data for planktic and benthic foraminifera f...
Published stable isotope records in marine carbonate are characterized by a positive d18O excursion associated with a negative d13C shift during the early Maastrichtian.... -
Sedimentation rates and geochemistry of the Atlantic and Indic Ocean of Late ...
Studies of the late Miocene-early Pliocene biogenic bloom typically have focused on high-productivity areas in the Indian and Pacific Oceans in order to achieve high resolution... -
Mg/Ca and stable isotope record of benthic foraminifera of the Paleocene-Eoce...
A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios... -
Revised chronology of Neogene DSDP holes from the World Ocean
After nearly 30 years of growth in geochronologic knowledge, the originally published age models for many older deep sea marine sections have become badly outdated. In this... -
Sequential variation of carbonate cycles in South Atlantic DSDP locations
We report well-dated Late Cretaceous and Early Tertiary precessional climatic cycles, recorded by rhythmic carbonate maxima and minima in South Atlantic deep sea sites. Spectral... -
Geochemistry of planktonic foraminifera from DSDP sites in the Atlantic and P...
The lithium content of planktonic foraminiferal calcite has been determined to evaluate temporal variability of seawater Li concentrations over the past 116 m.y. Mean... -
Geochemistry and strontium isotopic composition of interstitial waters of mar...
The concentrations and isotopic compositions of strontium in interstitial waters from several DSDP sites, where sediments consist chiefly of carbonate oozes and chalks, are used...