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Great Gray Owl photos taken at Idaho Fish and Game Habitat Area at the Regional Office in Lewiston, Idaho.
By Sherrie Thai of ShaireProductions.com
Feel free to download and use these as a background for commercial or noncommercial projects. If you decide to use them, please let me know how it goes by sending a link or an image. Enjoy!
Canon AE1, Tokina 1:4 28-85mm lens, Tiffen Polarizer Filter, Kodak Pro Image 100 film, Epson V750 Scanner
By Sherrie Thai of ShaireProductions.com
Feel free to download and use these as a background for commercial or noncommercial projects. If you decide to use them, please let me know how it goes by sending a link or an image. Enjoy!
Igneous rocks form by the cooling & crystallization of hot, molten rock (magma & lava). If this happens at or near the land surface, or on the seafloor, they are extrusive igneous rocks. If this happens deep underground, they are intrusive igneous rocks. Most igneous rocks have a crystalline texture, but some are clastic, vesicular, frothy, or glassy.
Obsidian is readily identifiable. It is a glassy-textured, extrusive igneous rock. Obsidian is natural glass - it lacks crystals, and therefore lacks minerals. Obsidian is typically black in color, but most obsidians have a felsic to intermediate chemistry. Felsic igneous rocks are generally light-colored, so a felsic obsidian seems a paradox. Mafic obsidians are scarce, but they are also black and glassy.
Obsidian is an uncommon rock, but can be examined at several famous localities in America, such as Obsidian Cliff at the Yellowstone Hotspot (northwestern Wyoming, USA) and Big Obsidian Flow at the Newberry Volcano (central Oregon, USA).
Obsidian is moderately hard and has a conchoidal fracture (smooth and curved fracture surface), with sharp broken edges. Freshly-broken obsidian has the sharpest edges of any material known, natural or man-made (as seen under a scanning electron microscope).
Obsidian forms two ways: 1) very rapid cooling of lava, which prevents the formation of crystals; 2) cooling of high-viscosity lava, which prevents easy movement of atoms to form crystals. An example of obsidian that formed the first way is along the margins of basaltic lava flows at Kilaeua Volcano (Hawaii Hotspot, central Pacific Ocean). Most obsidian formed the second way.
Seen here is a flow-banded gray obsidian - an unusual color. The flow bands are the subtle lines extending from the upper left.
Locality: unrecorded
Strymon melinus setonia, Lycaenidae
Vaseux Lake, Okanagan-Similkameen, British Columbia, Canada
Nikon D5100, 70-300 mm f/4.5-5.6
June 19, 2016
The gray catbird is a common bird that I see during spring migration.
El maullador gris un ave que veo mucho durante la migración de primavera.
I needed some subtler handknitted socks to wear with work clothing. I wear tons of gray and black so these socks will get a lot of use.
So far I'm really liking the yarn - Jo-Ann Soles & More. 75% superwash wool, 25% nylon and they're knitting up at 9 SPI (my preferred sock gauge for stockinette socks.
I'm going to try Wendy's toe up gusset pattern on these.