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Photo of the Day January 2023
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For the record I continue to really enjoy your images. OTOH I hate chem trails and would be inclined to crop out a portion of the sky. Regardless of that it is a lovely image.
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As I promised a bit more of an organized approach. Had posted this in December, but it was taken within a few minutes of yesterdays image. So here it is again. To avoid the sin of absolute duplication I have: Increased contrast, cropped a bit off the bottom, and added a slight sepia effect. Not sure which one I like better.
Lunch Creek, Logans Pass in Glacier National Park. July 1975.
Original Post: https://forums.macrumors.com/media/img_0139a-jpg.888104/
Ilford FP-4 4x5 film, ƒ-32, 1/25 sec, souped in Microphen.
Lunch Creek, Logans Pass in Glacier National Park. July 1975.
Original Post: https://forums.macrumors.com/media/img_0139a-jpg.888104/
Ilford FP-4 4x5 film, ƒ-32, 1/25 sec, souped in Microphen.
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TheYayAreaLiving 🎗️
Suspended
Noted- Thank you for your feedback. I appreciate it. I was thinking about cropping it as well but I wanted to leave it as is (original). Perhaps cropping it horizontally would have made it better like you suggested 🤔. Thanks, again! 🥰
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It all comes down to personal taste and whether you think the sky adds to or detracts from the effect you are trying to create. I freely admit my suggestion was somewhat the result of a personal bias, and entirely subjective.
BTW I should have said a horizontal crop or cropping out a portion of the sky. Vertically could certainly have been misleading, Post has been edited.
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It rained almost all day yesterday... was a beautiful, overcast day with a steady drizzle and intermittent downpours - the kind of wintry day we love so much here in the desert southwest... but then, just as sunset was approaching, the sky began to clear and I saw these beautiful billowy clouds just rolling back from the horizon, and the colors were magnificent. This is my meager attempt to capture that moment.
Sierra Blanca Texas. Favorite mountain I always take photos of on way to annual Tucson Az Rock, Mineral and Fossil Show. Sierra Blanca Mountain, which was in turn named for the white poppies that grew there (sierra blanca is Spanish for "white mountain"). I always thought name was from the whitish (well off white) colors of the volcanic rocks making it up. I guess an appropriate name in either case. A favorite view.
Since I am a retired geologist going to include a bit about this volcanic Mt : “The Sierra Blanca range begins two miles north of Sierra Blanca in south central Hudspeth County and extends ten miles to the northwest (with its center at 31°15' N, 105°26' W). The range has three distinctive conical, volcanic peaks: Sierra Blanca, the highest in the range, with an elevation of 6,891 feet above sea level; Little Blanca Mountain, with an elevation of 6,178 feet; and Round Top, with an elevation of 5,732 feet.”
and let me end with this technical section from report on the geology there for those geology nerds or professionals. Never looked this up before but it was time:
“The Sierra Blanca Peaks near Sierra Blanca, Hudspeth County, Texas consist of five topographically prominent, uncovered rhyolite laccoliths clustered within an area of about 13 km squared. The Sierra Blanca laccoliths were emplaced in sedimentary strata of Cretaceous age, probably during late Oligocene or early Miocene time. Erosion subsequently removed arched sedimentary beds and exposed the intrusive rhyolite bodies which presently form the upper part of the peaks. The floor of each laccolith is exposed in arroyos high on the steep slopes.
Rhyolite. Intrusive rhyolite caps all of the Sierra Blanca peaks. The base or floor of each of the rhyolite bodies which presently form the peaks is exposed in deeper arroyos high on the slopes, and drilling through the rhyolite on Little Blanca Mountain, Round Top and Little Round Top, revealed that the floors extend inward for at least 100 m (fig. 2). However, no discordant feeders were found. Where exposed at the lateral margins, on the slopes of the peaks, the laccolith floors appear to be generally concordant with the underlying strata, but drilling revealed that the floors are undulating and in contact with different Cretaceous formations at different places.
Several small erosional remnants of rhyolite sills cap low hills in the low areas between Round Top, Little Round Top and Little Blanca Mountain, and the southern escarpment boundary of the Diablo Plateau.
All the laccolithic intrusions are composed of rhyolite or porphyritic rhyolite. Most of the Sierra Blanca Peak and Round Top bodies are porphyritic, with quartz and K-feldspar phenocrysts (0.4 mm-1 mm) set in an aphanitic groundmass; a few small biotite phenocrysts may also be present. The Little Blanca Mountain and Little Round Top laccoliths are generally non-porphyritic
The basal 15 m of the laccoliths are strongly autobrecciated, and localized areas of crackle, rotated and fracture breccias are exposed at different places in the rhyolite bodies. Irregular-shaped pods and tabular masses of autobrecciated rhyolite are fairly common on Little Round Top and Little Blanca Mountain. A large brecciated zone crops out on the south and west flanks of the Sierra Blanca Peak laccolith. The breccias do not appear to be restricted to any particular position in the intrusions. Conspicuous lineations across the south flank of Round Top appear to be the result of abrupt changes in the dip of flow banding and subparallel fracturing. The rhyolite bodies in the Sierra Blanca Peaks probably intruded autochthonous Cretaceous strata in late Oligocene or early Miocene time.”
I will attach but not enlarge an image of a cross section of one of the laccoliths FYI since we are supposed to share only our photos just the educational part of me as a geologist who used to also help with public outreach at the Illinois Geological Survey.
Sent from my iPad
Since I am a retired geologist going to include a bit about this volcanic Mt : “The Sierra Blanca range begins two miles north of Sierra Blanca in south central Hudspeth County and extends ten miles to the northwest (with its center at 31°15' N, 105°26' W). The range has three distinctive conical, volcanic peaks: Sierra Blanca, the highest in the range, with an elevation of 6,891 feet above sea level; Little Blanca Mountain, with an elevation of 6,178 feet; and Round Top, with an elevation of 5,732 feet.”
and let me end with this technical section from report on the geology there for those geology nerds or professionals. Never looked this up before but it was time:
“The Sierra Blanca Peaks near Sierra Blanca, Hudspeth County, Texas consist of five topographically prominent, uncovered rhyolite laccoliths clustered within an area of about 13 km squared. The Sierra Blanca laccoliths were emplaced in sedimentary strata of Cretaceous age, probably during late Oligocene or early Miocene time. Erosion subsequently removed arched sedimentary beds and exposed the intrusive rhyolite bodies which presently form the upper part of the peaks. The floor of each laccolith is exposed in arroyos high on the steep slopes.
Rhyolite. Intrusive rhyolite caps all of the Sierra Blanca peaks. The base or floor of each of the rhyolite bodies which presently form the peaks is exposed in deeper arroyos high on the slopes, and drilling through the rhyolite on Little Blanca Mountain, Round Top and Little Round Top, revealed that the floors extend inward for at least 100 m (fig. 2). However, no discordant feeders were found. Where exposed at the lateral margins, on the slopes of the peaks, the laccolith floors appear to be generally concordant with the underlying strata, but drilling revealed that the floors are undulating and in contact with different Cretaceous formations at different places.
Several small erosional remnants of rhyolite sills cap low hills in the low areas between Round Top, Little Round Top and Little Blanca Mountain, and the southern escarpment boundary of the Diablo Plateau.
All the laccolithic intrusions are composed of rhyolite or porphyritic rhyolite. Most of the Sierra Blanca Peak and Round Top bodies are porphyritic, with quartz and K-feldspar phenocrysts (0.4 mm-1 mm) set in an aphanitic groundmass; a few small biotite phenocrysts may also be present. The Little Blanca Mountain and Little Round Top laccoliths are generally non-porphyritic
The basal 15 m of the laccoliths are strongly autobrecciated, and localized areas of crackle, rotated and fracture breccias are exposed at different places in the rhyolite bodies. Irregular-shaped pods and tabular masses of autobrecciated rhyolite are fairly common on Little Round Top and Little Blanca Mountain. A large brecciated zone crops out on the south and west flanks of the Sierra Blanca Peak laccolith. The breccias do not appear to be restricted to any particular position in the intrusions. Conspicuous lineations across the south flank of Round Top appear to be the result of abrupt changes in the dip of flow banding and subparallel fracturing. The rhyolite bodies in the Sierra Blanca Peaks probably intruded autochthonous Cretaceous strata in late Oligocene or early Miocene time.”
I will attach but not enlarge an image of a cross section of one of the laccoliths FYI since we are supposed to share only our photos just the educational part of me as a geologist who used to also help with public outreach at the Illinois Geological Survey.
Sent from my iPad
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Happy New Year! This was taken up in the Smoky Mountains. Live Photos is such an easy way to do a sort of faux long exposure of running water with a decent enough result I think!
EXIF: 12mini, ISO64, f2.4
EXIF: 12mini, ISO64, f2.4
My older brother had a passion for geology (became a petroleum engineer), and so we visited a rock shop in nearly every town we went to out west. Even in grade school he knew his schist!
Two females and a male Hooded Merganser enjoying the mild temperature on a sunny New Year's Day:
Uh, oh - red sky in the morning ...
Watch it pal! I'm a sailor if ya didn't know...
Back in my day and place (USMC), I'd have said squid or bus driver (all in good fun).
.. a colourful view from our balcony this morning (8 am PST) .. we face west, and only catch light & colours of a sunrise indirectly from the east.
