Pahoehoe lava at Craters of the Moon National Monument and Preserve. Three special kinds of pahoehoe may be observed in the Craters of the Moon Lava Field: Slabby pahoehoe is made up of jumbled plates or slabs of broken pahoehoe crust; shelly pahoehoe, which forms from gas-charged lava, contains small open tubes, blisters, and thin crusts; and spiny pahoehoe, which is very thick and pasty, contains elongated gas bubbles on the surface that form spines. (Courtesy of Craters of the Moon National Monument and Preserve)
September is the final month to celebrate 100 years of Craters of the Moon National Monument and Preserve’s establishment.
Since May, National Park Service staff have organized monthly activities and events to celebrate the hundredth anniversary of President Calvin Coolidge’s proclamation, which established the preserve to protect its unique lava landscape.
Visitors can participate in events related to this month’s theme, “Expansive Night Sky.”
The dates of this month’s events include: