[Geysers] RE: YNP spring depths

[Davis, Brian L.]

TSBryan at aol.com wrote:

> The following plumbed depths were reported by Allen
> and Day (1935), listed as reported [my additions in
> brackets]: name, depth (feet)...

Thank you very much! That gives an ideal overview of a lot of depths, in a lot of different places. How well do Allen & Day describe their methods? Clearly yet another primary source I'm going to have to dig into... as a caver, considering the conduit structures below grade is a bit of an obsession. Standing there looking at Mammoth Terrace for instance the average caver really feels bad that they're on-site a couple of million years too early. And when I look at something like Midway, with both the huge size of Grand Prismatic and the huge outflow of Excelsior, it really brings questions to mind. How well known is the bottom dimensions of something like Grand Prismatic (have there been any mapping efforts)?

All in all, it still surprises me how shallow some of these are; I've got systems with a total depth of 12' erupting in my backyard, although I can't get the heating system and volume required by a "real" geyser (well, that and for research I like them going off more frequently than once or twice a day... or longer).

-- 
Brian Davis