Wednesday, October 13, 2010
Some geo notes
The big storms early last week caused a spike in river volume and turbidity which tapered quickly. This week's warmth is causing the river to rise just a bit as the previous week's snow melts into the upper Merced watershed. The gully that drains Cathedral Spires sent a debris flow of sand and gravel several inches deep on to Southside Drive. A 3-part rockfall from near Horsetail Fall sent up a big dust cloud from the bench below El Capitan's East Buttress two days ago. Last week a local girl was seriously injured by a large slab of rock that fell near Church Bowl; she appears to be recovering well.
The famous sugar maple is just starting to show some red/orange color. Invasive locust trees are finally being removed from the Old Yosemite Village site. The meadows are the most yellow part of the Valley, with most of the oaks and maples still getting started in colors.
Oaks are dropping acorns, and Torreya is dropping its odd green 'drupes' in the localized pockets where that tree grows.