[Geysers] Lone Star

[Jeffrey Cross]

On 12 September 2005 Lone Star Geyser Basin was visited.

Buried Geyser erupted every 7.6 minutes (average of 10 intervals timed
from onset of overflow).  The range was 5-9 minutes.  The onset and
cessation of overflow are the only definite events in the cycle, though
the eruption is truly periodic.  The largest eruptions seen failed to put
water into the erosional moat that got carved in front of the crater
several years ago.  This is in contrast to 2003, when perhaps 1 in 5
eruptions would spill water over the front of the crater bowl and into the
moat.

"Clamshell Geyser" (UNNG by the Shoshone-Lone Star bridge) washed markers
overnight between 11 and 12 September.  It had been seen by Clark and
Rocco on the 9th.

Unnamed Geyser in the "Campsite Group" near campsite OA-2: in the NW
corner of this group, next to the stream, is an old sinter shield broken
by an ancient fracture.  A small, round pool next to this fracture had
heavy wash extending to the stream.  Clark and Rocco had seen it cycling
on the 9th, but did not see activity that would account for the full
extent of the wash.  On the 12th the surroundings were dry and their
marker from the 9th was still in place.

Jeff Cross
jacross at lamar.colostate.edu