The commercial grade of some of the ore, the easy accessibility throughout the area, the soft character of the host rC?cks and associated strata, and the fact that stripmining methods can be applied to all the deposits known at the present time, make the area attractive for exploitation. v

Thick sequences of gold-bearing quartzite conglomerate occur in latest Cretaceous and Tertiary formations and in Quaternary gravels derived from them in northwest Wyoming. Analyses of about 1,200 samples (by a new cyanide-atomic absorption method) and 750 panned concentrates representing 53 localities show the following averages in parts per billion and cents per cubic yard: Harebell Formation (latest Cretaceous), 65 (11 cents); Pinyon Conglomerate (Paleocene), 86 (14 cents); Fort Union Formation (Paleocene), 35 (6 cents); conglomerate of earliest(?) Eoceneage, 94 (14 cents);WindRiverFormation(early Eocene),222 (35 cents); Pass Peak Formation of Eardley and others (middle(?) Eocene), 47 (8 cents); Miocene(?) conglomerate, 65 (11 cents); Quaternary deposits, 103 (16 cents). These values are for the bulk rock although the gold is largely confined to sandstone layers and the sandy matrix of the conglomerates, which contain various proportions of pebbles and cobbles. The conglomerates were derived chiefly from Precambrian and possibly Paleozoic quartzite in a now-buried uplift northwest of the Teton Range. Although the grade is low, the volume, 50 cubic miles or more, is so large as to constitute a resource of enormous proportions. The presence of above-average grades in some localities suggests that local concentrations may exist and makes the conglomerates and their derivatives attractive for additional prospecting.

_________________________________________ Introduction _____________________________________ Purpose of report _____________________________ History of investigation _______________________ Acknowledgments _____________________________ Harebell Formation _______________________________ Name and definition ________________ _ Distribution and thickness _____________________ Lithology ____________________________________ Bobcat Member __________________________ Stratigraphic and structural relations __________ Age and correlation ___________________________ Gold occurrences ______________________ Targhee uplift source of quartzite conglomerate and gold ____________________________

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This publication aims to help growers and researchers understand the role of cover crops in improving soil health. The document provides recommendations on managing cover crops and describes the benefits of growing cover crops. Written by R. Seepaul, S. George, J. Love, D. W. Wright, C. Mackowiak, and A. Blount, and published by the UF/IFAS Agronomy Department, revised January 2023.