. The Canadian record of science. Natural history; Science. The Gold Deposits of Mount Morgan, Queensland. :;.;.) 4 ft/fa. alumina, manganese and gold were held in solution, to be deposited when the bulk of the water from time to time withdrew into the pipe or the subterranean reservoirs with which the pipe communicated. The overflow of the ejected fluid left a siliceous, aluminous and ferruginous deposit on the slope of the hillside, but the gold does not appear to have been deposited to any extent beyond the limit of the basin. It may be remarked that " prospects " of gold have bee
. The Canadian record of science. Natural history; Science. The Gold Deposits of Mount Morgan, Queensland. :;.;.) 4 ft/fa. alumina, manganese and gold were held in solution, to be deposited when the bulk of the water from time to time withdrew into the pipe or the subterranean reservoirs with which the pipe communicated. The overflow of the ejected fluid left a siliceous, aluminous and ferruginous deposit on the slope of the hillside, but the gold does not appear to have been deposited to any extent beyond the limit of the basin. It may be remarked that " prospects " of gold have been obtained in a few localities in the overflow deposit. In such cases it may be a question whether the gold was carried down the overflow or whether it emanated from some subsidiary springs, which, in such cases as our experience of active geysers lias shown, are pretty sure to break out in the vicinity of the main overflow. " CaHan's Knob," for instance, is suggestive of one of these smaller springs. The accompanying diagramatie sec- tion (Figure II.) represents my idea of what would take place in the case of a geyser remaining in activity for a, geologically speaking, lengthened period. The original form of the ground may be taken to have been the line (a a). At the end of an out- burst the sides of the hill would be Covered with a deposit of precipitated material (b b), while on the recession of the water from the cup. a film or layer of solid material (c c) would be deposited on its sides and bottom. If we suppose the cup to be a necessity. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal : Natural History Society
Size: 808px × 3093px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
