<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=US-ASCII" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 8.00.6001.18812"></HEAD> <BODY style="FONT-FAMILY: Arial; COLOR: #000000; FONT-SIZE: 10pt" id=role_body bottomMargin=7 leftMargin=7 rightMargin=7 topMargin=7><FONT id=role_document color=#000000 size=2 face=Arial> <DIV>Somewhere in this pile of stuff is that figure of 400 feet, in one or more reports, based on the depth of sedimentary valley fill. In the face of other tasks, I'm not going to pore through things any more. However, at least I did find this in Allen and Day: "In a bore-hole put down in 1929 by the Geophysical Laboratory at a point near Old Faithful Inn, altered rhyolite gravels were found immediately under the sinter and they continued downward for 220 feet." [This is the drilling conducted by C. N. Fenner; the site is near Myriad Geyser, in the Myriad Group.]</DIV> <DIV> </DIV> <DIV>Scott Bryan</DIV> <DIV> </DIV> <DIV> <DIV>In a message dated 10/5/2009 5:40:27 P.M. US Mountain Standard Time, Jeff.Cross@wallawalla.edu writes:</DIV> <BLOCKQUOTE style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>Who estimated the depth as 400 ft?<BR><BR>Jeff Cross<BR>jeff.cross@wallawalla.edu</FONT></BLOCKQUOTE></DIV></FONT></BODY></HTML>