also known as grape agate, at Hatt Ranch southwest of Green River, Utah.
was responsible for the destruction of the entire town of Rabaul in 1994, now rebuilt as seen below. On this day it was actively venting steam, but little else.
at the edge of a sunken crater.
with Zegrahm Expeditions, leaving in exactly one week. After traveling in polar regions for four-and-a-half months this year, this trip will feel like a tropical vacation! I’m looking forward to snorkeling on some of the most bio-diverse reef systems in the world.
occurred in January-July 1973 in Heimaey, Iceland, where a short-lived eruption of Eldfjell volcano nearly closed the tiny fishing harbor.
is an interesting and uncommon layered ultra-mafic intrusion in Kangerlussuaq Fjord in southeastern Greenland.
for four days, the northernmost town on Earth.
occur everywhere in Svalbard.
in the Norwegian Sea, a volcanic hot spot on which the most northern active volcano on Earth is found.
as we continue to travel north across the Arctic Circle and towards Spitsbergen in the Svalbard archipelago.
has been wonderful the past two weeks, with two geological highlights shown below.
is an unusual and rare CO2-driven cold water geyser that is depositing a colorful mound of travertine. Furthermore, it’s the result of an improperly abandoned oil/gas exploration well immediately south of Green River, Utah, and it periodically erupts on 8 and 22 hour-long cycles that are poorly understood.
Here’s an interesting technical reference about this unusual feature: http://www.llnl.gov/tid/lof/documents/pdf/334382.pdf
were the targets of exploration this weekend with long-time friends, an area of defunct uranium mines north of Arches National Park, with sedimentary-hosted uranium ore found in the Salt Wash Member of the Morrison Formation.