Now showing items 1-10 of 21
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 ...
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 ...
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 thorium, uranium and zirconium concentrations in bauxites and their relationship to bauxite genesis
For some time it has been known that certain bauxites contain greater amounts of thorium and uranium than the average crustal rocks. The primary purpose of this study was to make a general survey of bauxites to investigate ...
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 ...
A petrologic study of a portion of the Lower Beaumont clay
Petrologic studies have been made on sixteen samples of the Lower Beaumont clay collected from localities varying both horizontally and vertically on The Rice Institute campus, Houston, Texas. The samples were analyzed to ...
Global variations in the chemical compositions of basalt and andesite
The nonparametric rank-sum test is suggested as an improved nethod for comparing frequency distributions of individual components of chemical analyses which compose different statistical populations. The dalle index ...