About This Item
Share This Item
The surface textures of quartz sand grains from locations along the Florida Gulf Coast have been compared with those from other environments. High-magnification studies consistently show the predominance of chemical over physical textural features, which is to be expected in low- to moderate-energy coastal environments. Because of multiple reworking of these sediments, detailed environmental interpretations are difficult but not impossible. Distinctions are commonly quite subtle.
The great influence of the crystal structure of quartz on the physical and chemical surface features precludes the normal method of rapid scanning of several grains per sample by the electron microscope. Therefore, a statistical approach is suggested using a combination of Nomarski differential interference-contrast microscopy and scanning electron microscopy. A relatively high percentage of the total surface areas of large numbers of grains can be studied in detail by this method.
Stereopairs of scanning electron micrographs illustrate numerous surface textural features produced by a variety of sedimentary processes and environments.
End_of_Article - Last_Page 1695------------