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Gray-hooded (Grey-headed) Gull photographed on Coney Island Beach, near the Wonder Wheel, on July 30, 2011 in the late afternoon.
It has long been a bird I like to photograph, but this is the first time one stayed low and showed its orange under-tail coverts. And in the first light of day. Things feel pretty good when your birding starts like this.
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 flow-banded gray obsidian - an unusual color.
Locality: unrecorded
gray or grey include achromatic grayscale shades, which lie precisely between white and black, and neighboring colors with low colorfulness.https://paperwindowshades.com/best-gray-bali-blinds/
Howard William Gray at 7 months of age. In a group of photos from Wisconsin and Michigan. AZO stamp box dates to 1910-1930. RPPC.
Cousin Dessie spotted this Gray Tree Frog resting on the guardrail of the Duck River Bridge. Humphreys County,Tennesse 10.5.2012
Perisoreus canadensis
Gray Jay or Camp-robber
Order Passeriformes
Family Corvidae
THey are well adapted to the North Cascades, this bird was out and about in the snow.
DSCN7736b
At Elsen's Hill. This bird nests in far northern Canada and Alaska. We only see it in the spring and fall with migration. It looks similar to other thrushes. This one is probably young, the gray patch on the face is usually a little more notable.
Here are some key differences with the other thrushes:
Swainson's: prominent eye-ring
Wood thrush: much more spotted
on the chest
Veery:chunkier, essentially clean
white on the chest
Hermit thrush: reddish tail
Eastern Gray Squirrel_Sciurus carolinensis, are frequent visitors to my birdfeeder. However, they can't climb the metal pole, so they wait for seeds pecked or scratched out!