View allAll Photos Tagged Intermediate
Here are a bunch of thin, parallel sills and a few that turn into dikes at random angles (at the left). Notice how the right area with the most intrusions is surrounded by the palest sedimentary rock which matches the pale baked zones in the big dike posted two pictures away.
(crack surface)
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Obsidian 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. Mafic glass is usually called tachylite (if black) or sideromelane (if golden-brown).
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 (tachylite) 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 velvet rainbow obsidian, a rare variety. The rainbow effect is two-beam interference coloration (see: www.flickr.com/photos/jsjgeology/albums/72157672953170470/ ). Two-beam interference colors in Mexican rainbow obsidian occur due to the presence of flow-aligned microphenocryst rods in the glass (Ma et al., 2001). Microphenocrysts can be hedenbergite pyroxene (CaFeSi2O6) or plagioclase feldspar (NaAlSi3O8 to CaAl2Si2O8).
Locality: unrecorded / undisclosed site in Jalisco State, Mexico (but possibly from the La Revoltosa Mine at Mount San Andreas, east of the town of San Andrés, Magdalena Municipality, northwestern Jalisco State, western Mexico)
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Reference cited:
Ma et al. (2001) - Micro-analytical study of the optical properties of rainbow and sheen obsidians. The Canadian Mineralogist 39: 57-71.
Messier 100 is a grand design intermediate spiral galaxy in the constellation Coma Berenices. It is one of the brightest and largest galaxies in the Virgo Cluster and is approximately 55 million light-years from our galaxy and its diameter being 107,000 light years.
Telescope: WO ZenithStar 81 Refractor
Mount: Losmandy GM811G
Imaging Camera: ZWO ASI 2600MC Pro
Filter: Optolong L-Pro Filter
Site: Elk Grove, California, USA
Calibration Files: None
Guiding: ZWO ASI 174mm mini/Orion 60mm Guidescope/PHD2
Integration Time: 6h 3m
No of Frames: 121
Sub Exposure Time: 180 seconds
Bortle Zone: Class 6
Date Taken: April 8 & 9,2021
At home. We usually have one visiting the neighbourhood this time of year. But I've seen at least three in the area. Such a special guest at home in Humpty Doo, NT.
Totally in Photography Class at the moment (1/14/16 16:22 EST). We're posting stuff to Tumblr, but I'm waiting for everyone to hurry up.
There's a secret stash of LEGO in the Photography Studio, and I know where it is. Sadly, it's not mine though.
Intermediate Egret at Oxley Creek Common. Nikon D500, Tamron 150-600G2 at 600mm, 1/000s, f/7.1, ISO 280
Intermediate egret
This species looks similar to the great egret but smaller in size with neck length a little less than body length, has a slightly domed head, and a shorter and thicker bill.
Location- Jorhat, Assam, India
Explored - #498 on October 15, 2014
An Intermediate Egret perched on a rock. The patience of these birds to perch till they find their food is quite something - try spending time watching one of these, and it's quite easy to give up sooner than they make a move.
Saturday, April 1 at 230PM SLT Ravens Eye Gallery will be hosting an exhibit from the students of Cuardach University’s Intermediate Photography class! The dress code is smart-casual/cocktail.
Gadwall GADW (Anas strepera)
Drakes (right to left )
2,1 & rump of 3
see below
Helmcken Centennial Park
Portage Inlet
Saanich
Greater Victoria BC
DSCN6497
This small park at times idss loaded with ducks,geese and gulls.
I don't recall anywhere else in Greater Victoria one can have prolonged views of Gadwall out of the water.
Some "Gadwall-ogy" follows
:)
So the trio of males in this Park showcased something i found very interesting.
#1 bird has dark grey underparts - no white
#3 bird has most white underparts up to and including area around vent (butt hole)
#2 bird is intermediate ,with lighter grey from rear to mid point of belly - then going white towards breast
I am not sure if this is a colour variation within the species , or if the 1st bird represents "Full" breeding plumage and the other 2 are emergent sub adults or are still transitioning from eclipse
One would have thought we would be in full breeding plumage by now...yet GWTE have many (sub adults ? i think mostly ) working on it
Ardea intermedia
Family: Ardeidae
Order: Pelicaniformes
I would be interested in any suggestions as to what our friend has caught from the edge of the lake!
DSC01976
The intermediate egret, median egret, smaller egret, or yellow-billed egret is a medium-sized heron. Some taxonomists put the species in the genus Egretta or Mesophoyx. It is a resident breeder from east Africa across the Indian subcontinent to Southeast Asia and Australia
This Intermediate Egret In breeding plumage was foraging for food and as I approached he started to dance.
I can not help but love the birds that I photograph. I was very excited to see this bird perform like he did.
Captured at Cotton Tree, Maroochydore, Sunshine Coast, Queensland Australia.
Nikon D810, Nikkor 200-500mm, f/5.6E, 1/4,000 sec, ISO500.
An Intermediate Egret in the shallows of Pine River on Sunday afternoon. These birds have long legs! This is equivalent to us standing in water just above the knees. Very inquisitive species. This one came close enough to check me out and wasn’t phased by my presence.