#Gneiss boulder

I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near #Sturbridge, #Massachusetts. Because it has been transported and I just took a photo, I don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.
#gneiss #Paleozoic #metamorphic #geology #photo 27 mm #Fujifilm

#Gneiss boulder

I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near #Sturbridge, #Massachusetts. Because it has been transported and I just took a photo, I don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.
#gneiss #Paleozoic #metamorphic #geology #photo 27 mm #Fujifilm

#Gneiss boulder

I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near #Sturbridge, #Massachusetts. Because it has been transported and I just took a photo, so don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.
#gneiss #Paleozoic #metamorphic #geology #photo 27 mm #Fujifilm

Lovely gneiss boulder

I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near #Sturbridge, #Massachusetts. Because it has been transported and I just took a photo, so don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.
#gneiss #Paleozoic #metamorphic #geology #photo 27 mm #Fujifilm

#ThinSectionThursday Here's a wonderful rock (garnet-scapolite pyroxenite, with feathery symplectite intergrowths around the garnets) from the Lewisian metamorphic complex in South Harris, in both plane polarized light, and between crosed polars. The field of view is about 2mm. See ALT text for detailed image descriptions. #Lewisian #Metamorphic #Rocks #Minerals.

@seelix “Pebble” is a defined grain size classification on the Wentworth scale for sediments

https://www.jstor.org/stable/30063207#metadata_info_tab_contents

As a sedimentologist, I’m intrigued by the brand name, but I think “Fruity Phenocrysts” sounds fun, and “Fruity Porphyroblasts” sounds even funner.

#geology #sediments #geoscience #EarthScience #igneous #metamorphic @geoscience

#Wapack Range, #Ashburnham, #Massachusetts #USA

#Woodland scene with stone wall on a foggy summer day, between #Watatic Summit (558 m) and Nutting Hill, near the #NewHampshire border.

The range comprises #Silurian to #Devonian #sedimentary rocks from the peri-#Laurentian Central Maine Trough, metamorphosed in #Appalachian #orogenies.

My #photo, #Fujifilm #XH1 16 mm f/1.4 at f/8 and 1/10 s ISO 400, IBIS on

#mountain #NewEngland #forest #stonewall #ferns #fog #landscape #trees #Metamorphic

#FridayFold These limpets are enjoying these superb ptygmatic folds in Moine rocks east of Ardalanish Bay, in SW Mull. 😋 🤩 #Geology #Deformation #Metamorphic

Proterozoic Volcanics in northern Rhode Island
The Blackstone Group (Rhode Island and Massachusetts, USA) is a sliver of very old, probably oceanic crust glommed onto Avalonia in its stroll from Gondwana to Laurentia. Its quartz and carbonate lithosomes are, err, difficult to explain. It’s older than the ca. 600 Ma Dedham Granite, which has a roof pendant esposed near Pawtucket.
#igneous #Metamorphic #rocks #geoscience #geology #massachusetts #rhodeisland #volcanic #photography

My Stepmother have a #countertop that I love. They know my love of #geology and had a cutting board made for me as their counters were installed.

Wanting to read about the geology of "#Ubatuba granite "I was surprised to discover it's considered #igneous and/or #metamorphic and it's a charnockite, a new term for me. I'll have some reading to do once home!

http://www.jsjgeology.net/Charnockite-decorative-stone.htm
https://en.m.wikipedia.org/wiki/Charnockite
https://www.sciencedirect.com/science/article/pii/S1674987112000631
#charnockite #PavementGeology

Anybody knows what these minerals are? Hint: This is thin section (PPL) of a rock from the contact aureole of the Bugaboo Batholith at Cobalt Lake (SE British Columbia; photo also below).

#ThinSectionThursday #metamorphic #petrology

#DogWalkingGeology Fabulous morning on frosty Ardalanish beach in Mull. Spud enjoying this lovely clean calc-silicate outcrop, with pink garnets, dark hornblende, and white plagioclase and quartz. #Moine #Metamorphic #AmphiboliteFacies

I see #qoto people doing an #introduction so I should also do a hashtag barrage...

First Life: #geology, #metamorphic #petrology, #isotope #geochemist, #geochronology, #subduction.

Second life: Trophy Husband.

Third Life: #downstream #biomanufacturing, #quality control, cGMP, #protein stability, #analytical #chemistry

meanwhile: #grindcore #metal

I hope I did those hashtags right or I'm gonna look like an #idiot