Hotspots include midplate features like Hawaii and on-axis features like Iceland. Mantle
plumes are a well-posed hypothesis for their formation. Starting plume heads provide an …

The role of Quaternary ice sheet fluctuations in driving meltwater pulses and ocean
circulation perturbations is widely acknowledged. What is less clear is the role of these …

Abstract The Eocene and Oligocene epochs (∼ 55 to 23 million years ago) comprise a
critical phase in Earth history. An array of geological records,,,, supported by climate …

Marine sedimentary rocks drilled on the southeastern margin of the South Orkney
microcontinent in Antarctica (Ocean Drilling Program Leg 113 Site 696) were deposited …

There is growing consensus that development of a semipermanent ice sheet on Antarctica
began at or near the Eocene-Oligocene (EO) boundary. Beyond ice-rafted debris in oceanic …

In this study we report the sediment grain size parameters and surface textural observations
(using scanning electron microscopy (SEM)) of quartz grains from sediments of Sandy Lake …

Surface features of quartz and zircon grains in the Barra del Tordo (PBT) and Tesoro (PT)
beaches, NW Gulf of Mexico (GoM), were analyzed. The microtextures in the PBT and PT …

Earth's current icehouse phase began∼ 34 my ago with the onset of major Antarctic
glaciation at the Eocene-Oligocene transition. Changes in ocean circulation and a decline in …

Micromorphology of quartz sand grains is used to reconstruct processes occurring in the
glacial environment and to distinguish the latter from other environments. Two processes …

Based on scanning electron microscopy (SEM) images, we studied the microtextures of
quartz grains recovered from the Boca del Cielo and Chocohuital beach sediments in the …