Debris flows on alluvial fans are a geologic hazard that can be of considerable consequence. This debris flow spilled large logs above the incised stream channel several years ago. I used my cell phone to record a few observations.
The Monthly Fern??—Prairie Spikemoss
-
*Selaginella densa*—moss, fern, fern ally, or none of the above? Coin is 19
mm across.This month the South Dakota fern series features another oddity—a
s...
5 days ago
No comments:
Post a Comment