<html> <head> <style></style> </head> <body class='hmmessage'> The data I'm compiled may not be extensive enough for your purposes, but I did compiled a list of pool/tube depths from Allen & Day, and two reports in Yellowstone Nature Notes.  The compilation included descriptions of how the de[ths were determined.  The compilation was published in an issue of the Sput.  Since I don't have access to a complete collection of the Sputs, I sorry, but I don't have the reference to the specific month/year available.  Someone else may be able to provide that information for you.   Lynn Stephens   > From: brdavis@iusb.edu > To: geysers@lists.wallawalla.edu > Date: Thu, 1 Oct 2009 20:55:01 -0400 > Subject: [Geysers] Conduit dimensions - sources? > > I've been reading through Rinehart's "Geyers and Geothermal Energy", and came across a rather unusual claim - that there was a thermister measurement in Old Faithful at a depth of 175 m (!!). I'm trying to get the original reference (a paper of Rinehart's from 1969), but it brought up a raft of other questions. Principally, what geysers and hot spring have been plumbed, and what is known about their physical dimensions of their conduit systems? What I've got so far: > > Old Faithful: 22 m deep (or 175 m, if Rinehart is correct) > Great Geysir: Top basin 16 m wide by 1 m deep, conduit below 3 m wide and 20 m deep. > Lion: 24 m deep, with a 1" constriction at 10 m, water stands 5 m below the top. > Great Fountain: 12 m deep and roughly 4 m by 6 m, fed from a small vent at the bottom. > Sapphire Pool: about 10 m deep, diameter 8 m (pre-earthquake; source notes it's "bigger now", without specifics). > Steamboat: NE vent 8.5 m deep with water 3.4 m below sill in SW vent, SW vent 25.9 m deep ("the greatest depth we have attained in a natural Yellowstone vent"). > Echinus: 3.4 m below the overflow level > Cinder Pool: 9 m in diameter, 18.3 m deep is interface, with molten sulfur below that to 21.3 m depth. > Grand Prismatic Spring: 75 m by 90 m, 49 m deep (but I don't have a primary source on this) > Excelsior: (nothing yet, just discharge statistics) > > I also have one reference that mentions when talking about Cinder Pool "“…at least 13 m (44 ft) of overlying water is necessary to provide the pressure required for temperatures of 120 °C to exist in a saturated water-steam system; less than 10 % of the vents probed in Yellowstone Park have such free vertical clearance, and of these, only Cinder Pool and Steamboat Geyser are in Norris Basin…". That suggests that they had a volume of data large enough to talk about statistics... but I don't know where. > > Does anyone have other data? Other primary sources to look at? Other interesting tidbits about directly measured or inferred conduit geometries (thermal, seismic, or chemical)? > > -- > Brian Davis > _______________________________________________ > Geysers mailing list > Geysers@lists.wallawalla.edu > https://lists.wallawalla.edu/mailman/listinfo/geysers <hr />Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. <a href='http://clk.atdmt.com/GBL/go/171222985/direct/01/' target='_new'>Sign up now.</a></body> </html>