Billy Glass - Academia.edu (original) (raw)

Billy Glass

I am retired, but still doing some research.

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Papers by Billy Glass

Zenodo (CERN European Organization for Nuclear Research), Apr 17, 2023

Investigation of glass particles recovered from Apollo 11 and Apollo 12 fines, and composition an... more Investigation of glass particles recovered from Apollo 11 and Apollo 12 fines, and composition and heteorogeneity of lunar surface

Geology, 1987

Ross and Fisher (1986) described semicircular (U-shaped) grooves on the surfaces of volcanic glas... more Ross and Fisher (1986) described semicircular (U-shaped) grooves on the surfaces of volcanic glass shards that they attributed to acid secreted by microorganisms. The grooves range from 4 to 80 /xm, and the depth is usually half the width. Individual grooves are generally uniform in width. One group has annulations or striations perpendicular to the length of the grooves. The grooves generally intersect at large angles (65°-90°) and often terminate where they intersect other grooves, sometimes forming "hanging valleys." The size, morphology, and geometry of the grooves are similar to those found on ~0.1 Ma Ivory Coast microtektites from the equatorial Atlantic (Glass, 1974) (Fig. 1). The U-shaped grooves on the microtektites are similar to those found on tektites, particularly billitonites, except for their size (up to several millimetres in width) (Baker, 1959). The large sizes of the U-shaped grooves on the tektites preclude their being formed by acid-secreting microorganisms. The U-shaped grooves on the tektites and microtektites are believed to be the result of solution of cracks formed by thermal contraction. Van der Veen (1923) produced similar grooves ("worm tracks") on polished surfaces of moldavites by heating them to 800 °C, cooling them in a water jet, and then etching the surface. Apparently, the heat treatment produced fine cracks that were then widened by solution. The geometric pattern (i.e., tendency for the grooves to intersect at large angles) is similar to the pattern of cracks produced by contraction.

ABSTRACT Electron microprobe and petrographic analyses of crystalline rock and separates from apo... more ABSTRACT Electron microprobe and petrographic analyses of crystalline rock and separates from apollo 11 lunar soil samples

In 18 Muong Nong-type tektites, concentrations of Be-10 and of mineral inclusions anticorrelate. ... more In 18 Muong Nong-type tektites, concentrations of Be-10 and of mineral inclusions anticorrelate. Be-10 is lowest and the source crater probably lies within a region between the southern Laotian border and the southwestern tip of Hainan Island, China.

Reports on Astronomy, 1982

Physics of the Earth and Planetary Interiors, 1989

During the present study the Ivory Coast microtektite layer was found in cores from five equatori... more During the present study the Ivory Coast microtektite layer was found in cores from five equatorial Atlantic sites, bringing the total number of Ivory Coast microtektite-bearing cores to eleven. The strewn field appears to be restricted to between 9°N and 12°S latitude. There is a general increase in the concentration of microtektites towards the Bosumtwi crater, which is generally thought to be the source of the Ivory Coast tektites. The relationship between the onset of the Jaramillo subchron and the Ivory Coast microtektite layer has been investigated in six cores. A plot of the difference in depth between the base of the Jaramillo subchron and the microtektite layer versus sediment accumulation rate was used to determine the average post-depositional remanent magnetization (PDRM) acquisition depth and the age difference between the onset of the Jaramillo subchron and the deposition of the microtektites. Assuming that the PDRM acquisition depth does not vary with sediment accumul...

Meteoritics & planetary science