West Thumb Geyser Basin, Lower Group - page 2
The Thumb Paintpots are located near the southern edge of Lower Group. Compared to Fountain Paint Pot and Artists' Paintpots they are more vivid in terms of color, but less active.
Pastel colored mud cones are the characteristic features of Thumb Paintpots. If more sulfur would be present, the colors would turn into the common dark gray we know from the majority of all mud pots worldwide.
There are also some hot pools within the paint pot area. The largest one is WTLGNN091 in center.
In the north three further pools are to be found.
The pools WTLGNN082 and WTLGNN081 show an exceptional composition of pastel blue and green.
A splashing mud pot appears in the south next to the boardwalk.
At short distance southwest of Thumb Paintpots two stunning hot pools catch the eye: Seismograph Pool and Bluebell Pool.
Downslope of Seismograph Pool the trail descends to the lake shore. Passing the nearly always submerged Winter Spring on the right, the first noteworthy feature you come across is Lakeside Spring.
A few feet north of Lakeside Spring the slope is perforated by many tiny springs. Among them Venting Pool is the most prominent one. Every now and then some of the springs show weak spouting activity.
Then the boardwalk proceeds to Lakeshore Geyser. Usually this geyser is submerged. Unfortunately, it can not erupt if covered by water. But even at low water levels, when the cone is exposed, eruptions are very rare.
Next stop on the way north is Vandalized Pool. The name leads to the assumption that this pool must have been damaged by humans in the past. Vandalized Pool becomes flooded by the lake at very high water levels.
Diagonally across the boardwalk from Vandalized Pool Fishing Cone occupies the shore. Although it is a little bit more elevated than Lakeshore Geyser, it becomes quite often flooded by the lake. In the early 20th century Fishing Cone showed eruptions up to 12 m (40 feet) high, but nowadays activity is reduced to a weak splashing, if at all. Its clearly visible side vent was active the last time around 2009, as documented by geyser gazer Robin A. Reynolds-Haertle.
A third dominant geyser cone on the lake shore is Big Cone. At best Big Cone shows some splashing, but even that is rare.
On the other side of the boardwalk Little Cone can be observed. This one is not known for spouting activity.
Last noteworthy feature along the lake shore is a small spring north of Little Cone which seems not to be listed in the RCN database.
