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Landscape painter Thomas Wood is in the midst of a four-Saturday show at his small studio on the square in Nicasio. The show will wind up from 10 a.m. to 3 p.m. Saturday, May 25, and anyone who hasn’t seen it yet really ought to take a ride to Nicasio.

“My paintings are meditations on nature,” Wood comments, and indeed all the works on display are landscapes (with a bit of the Petaluma River thrown in). Morning, the painting at the upper left, portrays the morning fog in the trees.

Wood <twoodart.com> has taken part in more than 150 exhibits. Works by Wood and Point Reyes Station photographer Art Rogers were shown together at West Marin galleries in 2008 and 2009. Last year he held a well-received show in Toby’s Feed Barn Gallery and sold a number of paintings.

 Petaluma River in downtown Petaluma.

Redwoods.

The marsh at Schooner Bay.

Nicasio Reservoir changing hues. On our way home from Wood’s exhibit, my wife Lynn Axelrod Mitchell, and I stopped beside Nicasio Reservoir to try to figure out what is making a cove look light blue. It couldn’t be art. Could it be chemistry? (Lynn, by the way, shot all the photos in this posting on her Iphone because the battery in my Nikon was dead.) The shoreline at left is lined with foam, so I called Marin Municipal Water District, which owns the reservoir, to find out if it knew of anything dangerous in the water.

Update: I got a call back Tuesday morning and was told what looks light blue is probably some form of algae, which also occurs at Bon Tempe Reservoir. District staff, however, took water samples to confirm that the reservoir was safe.