A Seasonal Lake

A Seasonal Lake (HM1K1Q)

Location: , CA Mariposa County
Country: United States of America

N 37° 44.894', W 119° 32.981'

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Mirror Lake was once regarded by park scientists as a stream-fed lake slowly filling in to become a meadow. As hydrologists have developed a more complex understanding of the water's dynamics, they now theorize that the "lake" is a pool in a seasonal stream. Changes in the volume and speed of the stream's water cause sand to be deposited in and scoured from the pool in cycles.

Rockfall Changes
The rockfall that created Mirror Lake altered the streamside habitat of Tenaya Creek. More aquatic and streamside plants took hold in the pooled water and saturated soils. These plants, in turn, are habitat for ducks, frogs, and other aquatic species that prefer still water.

Endangered Species Habitat
The cliffs and rocky crevices looming above Mirror Lake are prime nesting spots for peregrine falcons and spotted bats, two of the park's endangered species. Swifts and swallows also roost there, feeding on insects that thrive in the pooled water. Peregrine falcons prey upon the insect-eating birds.
HM NumberHM1K1Q
Placed ByYosemite Fund
Marker ConditionNo reports yet
Date Added Sunday, April 19th, 2015 at 6:02pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)11S E 275362 N 4180942
Decimal Degrees37.74823333, -119.54968333
Degrees and Decimal MinutesN 37° 44.894', W 119° 32.981'
Degrees, Minutes and Seconds37° 44' 53.64" N, 119° 32' 58.86" W
Driving DirectionsGoogle Maps
Closest Postal AddressAt or near Snow Creek Trail, CA , US
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