Clarke Belt

Clarke Belt Collective term for geosynchronous orbits, named for Arthur G. Clarke, noted science fiction author, who was the first to propose the use of satellites in these orbits for communications. 

Commercial com and wheat belts began to develop. Wheat occupied the newer and cheaper areas and was constantly being forced westward by rising land values and the encroachment of corn however, New York, Pennsylvania, and Ohio were still the chief wheat-producing states (Clark, 1966). 

Since ordinary chondrites account for —80% of all meteorite falls (Table 1), it was once believed that their parent bodies were common in the main asteroid belt. However, spectral studies show that most asteroids are dark and featureless (C and related types), and most of the brighter S type differ from ordinary chondrites. H group chondrites probably come from one or more S-type asteroids, possibly 6 Hebe (Burbine et al, 2002). Ordinary chondrites are probably rare in the main part of the asteroid belt (Meibom and Clark, 1999), though they may account for —20% of the near-Earth objects (Binzel et al, 2002). A few ordinary chondrites including Tieschitz (Figure 1(a)) do not fit comfortably into the H, L, and LL groups and may be derived from separate bodies. 

Meibom A. and Clark B. E. (1999) Evidence for the insignificance of ordinary chondrite material in the asteroid belt. Meteorit. Planet. Sci. 34, 7-24. 

Stuart, G. W., Zengeni, T. Clark, R. A. 1986. Crustal structure of the Limpopo mobile belt, Zimbabwe. In Abstracts, the Tenth UK Geophysical Assembly. Royal Astronomical Society, London, 261. 

Figure 10-2. This forklift operator is correctly wearing his seat belt and looking in the direction of travel. (Courtesy of Clark Material Handling Company)...

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