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Show shoreline. Skull Valley, Rush Valley, and Cherry Creek in the Sevier Basin are the westermost Bonneville basin locations of these two leeches, except for populations in the Thousand Creek drainage, which is in the far NW corner of the Bonneville basin. Stop [ 7]. The purpose of this stop is to review a few aspects of the complex geomorphic development of a truly remarkable ( and vulnerable) feature- a feature dubbed the " Great Bar at Stockton, Utah" by G. K. Gilbert. The Stockton Bar, as it is now known in the files of the U. S. Board of Geographic Names, is unrivaled in the Bonneville basin and in the western hemisphere seems to be rivaled only by a comparable feature in the Lahontan basin- a feature dubbed the " Humboldt Bar" by I. C. Russell. Superlatives aside, our discussion of the Stockton Bar's geomorphic development during the deepest- water stages of Lake Bonneville will be illuminated by ground- penetrating radar ( GPR) imagery of some of the bar's ( not really a bar from a coastal studies standpoint) internal structure. Several of the GPR images, collected during several visits in recent years by a University of Calgary team led by Derald Smith, is displayed in a GBASH poster. En route from Stop [ 7] to Stop [ 8]. Between the Stockton Bar and Tooele, features related to the bar's geomorphic development will be pointed out from the bus. ( Hovingh on aquatic fauna in the Cedar Valley subbasin) Historically, the amphibians Rana pipiens and Bufo woodhousii occupied the springs. Both of these amphibians were also found at Utah Lake, from which they migrated. ( Hovingh on historic mollusks in the Utah Lake subbasin) The molluscan fauna of Utah Lake consisted of Fluminicola ( perhaps the most abundant of all the mollusks), Valvata utahensis, Valvata humeralis, Lymnaea stagnalis, Stagnicola utahensis, Stagnicola elodes, Physa utahensis, Carinifex newberryi, Helisoma trivolvis, Sphaerium striatinum, and Anodonta californiensis. The extensive remains of Fluminicola, a spring and river species, suggests that the shallow waters of Utah Lake might be treated ecologically as a slow- moving stream. Annual inflow to Utah Lake equals the volume of the lake, which allows spring runoff to largely purge lake water of the previous year. Shells of these mollusks are not evenly distributed around the lake. Most of the species are found at the north and west end of the lake. On the south and west sides of the lake, shells are those of Sphaerium and Fluminicola, whereas in Goshen Bay the shells are the large Helisoma trivolvis. Stop [ 8]. Bon apetit. |
