Now showing items 1-10 of 21
The relationship between the petrology and the thorium and uranium contents of some granitic rocks
The object of this investigation is to find large scale variations in thorium and uranium contents of granitic rocks and to link these variations to petrographic types and to geological characteristics of the plutons in ...
A comparison of some Eocene and modern sediments by coarse fraction analysis
Examination of an ancient sedimentary basin can provide only an incomplete geologic picture, because it reveals merely the anatomy of a dead body. Physiology must be learned on a living organism, and likewise the geologist ...
The environmental significance of stratification
Abstract Not Available.
The distribution of thorium, uranium, and potassium in a Pennsylvanian weathering profile and the Mancos Shale
The purposes of this investigation were to determine the effect of chemical weathering on the distribution of thorium and uranium in a single weathering profile, and to investigate the distribution of these elements in a ...
A lithologic analysis of the Galveston beach sand with special emphasis on heavy minerals
In this thesis, mineralogical and textural analyses of the sand-silt beach ,deposits of Galveston. Island, Texas, are presented, with special emphasis on. heavy minerals. It is the intent of the author; 1) to describe the ...
Textural properties of some source materials of clastic sediments
The purpose of this study has been to measure and describe the size distribution, shape, roundness, and mineralogic composition of sediments recently weathered from granite and at or very near their source, and to discuss ...
A seismic study of the shallow sub-bottom materials of the eastern Caribbean
Investigations were undertaken in the Caribbean-Antilles region in an attempt to describe the broad structural and compositional attributes associated with this striking geographic feature, The topographic feature of the ...
Seismic investigation of geological structure bordering the Caribbean Island arc, part I
In recent years the seismic refraction technique has been used extensively to study the crustal structure of the earth beneath the great oceanic areas. These studies have led to the recognition of a characteristic oceanic ...
Differentiation of a lamprophyre sill
Differentiation trends in rock bodies of various sizes and types have been studied, from different viewpoints and with contrasting results, by many geologists in this country and abroad* Such studies are of major importance, ...