Alf A. Orvik
@alforv.bsky.social
Norwegian geologist, researcher by day, nerd (and father) by night. I dig into magmatic rocks, ore deposits, news, books, and video games.
Reposted by Alf A. Orvik
Fieldwork in the Råna intrusion in Northern Norway with an amazing view of the Ofoten fjord.
August 17, 2025 at 2:34 PM
Fieldwork in the Råna intrusion in Northern Norway with an amazing view of the Ofoten fjord.
Reposted by Alf A. Orvik
![Comic. [3-column table with headers Period, My Favorite Part, and My Biggest Complaint] [Row 1] P: *Precambrian*, MFP: Life develops, MBC: Snowball Earth episodes [Row 2] P: Cambrian, MFP: Trilobites!, MBC: Evolution could stand to calm down a little [Row 3] P: Ordovician, MFP: Earth might have had rings, MBC: Scary volcanic eruption in North America [Row 4] P: Silurian, MFP: First land animals, MBC: Earth’s newfound mold problem [Row 5] P: Devonian, MFP: Big mountains in Boston, MBC: Yeah, sure, what those giant killer fish needed was *armor* [Row 6] P: Carboniferous, MFP: Cool forests, MBC: Bugs too big [Row 7] P: Permian, MFP: Pangea, MBC: Google “The Great Dying” [Row 8] P: Triassic, MFP: Tanystropheus [dinosaur with extremely long neck next to tiny person for scale], MBC: Damage to Canada still visible from space at Manicouagan [Row 9] P: Jurassic, MFP: Birds, MBC: Parasitoid wasps [Row 10] P: Cretaceous, MFP: Raptors, MBC: Raptors [Row 11] P: Paleogene, MFP: Pretty horseys!!!, MBC: Paleocene-eocene thermal maximum [Row 12] P: Neogene, MFP: Forests of *Dracaena* Dragonblood Trees, MBC: Zanclean Flood [Row 13] P: Quaternary, MFP: Burrito invented, MBC: Whoever picked this name for the third period of the Cenozoic](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreifyh56h2dhfnxxuarc6hspobseq6jzurt7mnkuo3dkvlkyrw6e76i@jpeg)
July 28, 2025 at 11:58 PM
🧪⚒️🚨 New paper!
Zircon U-Pb & Hf data from SW Fennoscandian Shield reveal that breaks in westward-younging crustal trends mark zones of extension & Ni-bearing mafic intrusions.
Zircon U-Pb & Hf data from SW Fennoscandian Shield reveal that breaks in westward-younging crustal trends mark zones of extension & Ni-bearing mafic intrusions.
Isotopic identification of paleo rift zones within the Sveconorwegian Province; implications for nickel sulphide mineralisations in the SW Fennoscandian Shield
The southwestern Fennoscandian Shield hosts significant orthomagmatic nickel sulphide deposits linked to pre-Sveconorwegian crustal evolution. This st…
www.sciencedirect.com
June 7, 2025 at 5:55 PM
🧪⚒️🚨 New paper!
Zircon U-Pb & Hf data from SW Fennoscandian Shield reveal that breaks in westward-younging crustal trends mark zones of extension & Ni-bearing mafic intrusions.
Zircon U-Pb & Hf data from SW Fennoscandian Shield reveal that breaks in westward-younging crustal trends mark zones of extension & Ni-bearing mafic intrusions.
Reposted by Alf A. Orvik
Reposted by Alf A. Orvik
April 3, 2025 at 3:21 PM
Reposted by Alf A. Orvik
Finance Guy Doing Cocaine In Sad Way This Time
April 4, 2025 at 4:25 PM
Finance Guy Doing Cocaine In Sad Way This Time
Reposted by Alf A. Orvik
Reposted by Alf A. Orvik
9 March 1866 1:20 UT
Mw5.7-5.8 earthquake hit offshore Molde, Norway, causing damage in many houses. Felt from central Sweden to northern Scotland and also in several boats, it was one of the largest Norwegian EQs.
doi.org/10.1002/eqe....
doi.org/10.1016/0040...
newspapers.library.wales
Mw5.7-5.8 earthquake hit offshore Molde, Norway, causing damage in many houses. Felt from central Sweden to northern Scotland and also in several boats, it was one of the largest Norwegian EQs.
doi.org/10.1002/eqe....
doi.org/10.1016/0040...
newspapers.library.wales
March 9, 2025 at 8:22 AM
9 March 1866 1:20 UT
Mw5.7-5.8 earthquake hit offshore Molde, Norway, causing damage in many houses. Felt from central Sweden to northern Scotland and also in several boats, it was one of the largest Norwegian EQs.
doi.org/10.1002/eqe....
doi.org/10.1016/0040...
newspapers.library.wales
Mw5.7-5.8 earthquake hit offshore Molde, Norway, causing damage in many houses. Felt from central Sweden to northern Scotland and also in several boats, it was one of the largest Norwegian EQs.
doi.org/10.1002/eqe....
doi.org/10.1016/0040...
newspapers.library.wales
Reposted by Alf A. Orvik
Reposted by Alf A. Orvik
This includes the USGS Hawaiian and Alaska Volcano Observatories. HVO's Ironworks is a temporary space while a new facility is built to replace the Observatory critically damaged in 2018. Both groups are near their volcanoes. Neither has anywhere to go and both have been forbidden from telework.
Congress has just released a list of federal DOI offices to be closed under the ongoing massacre of our natural resource agencies -- it's extensive and includes many important NPS, BLM, USGS and USFWS facilities across the country. Truly horrific. democrats-naturalresources.house.gov/imo/media/do...
democrats-naturalresources.house.gov
March 2, 2025 at 3:53 PM
This includes the USGS Hawaiian and Alaska Volcano Observatories. HVO's Ironworks is a temporary space while a new facility is built to replace the Observatory critically damaged in 2018. Both groups are near their volcanoes. Neither has anywhere to go and both have been forbidden from telework.
Reposted by Alf A. Orvik
February 12, 2025 at 6:49 PM
🤦♂️
What a time to be alive. Seriously, we live in the stupidest of timelines. #Greenland
February 11, 2025 at 7:22 PM
🤦♂️
Reposted by Alf A. Orvik
For anyone who’s written a scientific paper, this makes absolutely no sense unless your goal is to censor science.
“The U.S. Centers for Disease Control and Prevention is seeking to withdraw all papers involving its researchers that are being considered for publication by external scientific journals to allow for a review by the Trump administration” 🧪
www.reuters.com/world/us/us-...
www.reuters.com/world/us/us-...
US CDC orders pullback of new scientific papers involving its researchers, source says
The U.S. Centers for Disease Control and Prevention is seeking to withdraw all papers involving its researchers that are being considered for publication by external scientific journals to allow for a review by the Trump administration, a federal official told Reuters.
www.reuters.com
February 3, 2025 at 5:14 PM
For anyone who’s written a scientific paper, this makes absolutely no sense unless your goal is to censor science.
Reposted by Alf A. Orvik
Jada, Elon Musk heier på AfD, men det betyr ikke at han er nazist, ville en nazist liksom hatt interesser som... eh, raketter, og... øh, kraniestørrelse
January 4, 2025 at 7:06 PM
Jada, Elon Musk heier på AfD, men det betyr ikke at han er nazist, ville en nazist liksom hatt interesser som... eh, raketter, og... øh, kraniestørrelse
Reposted by Alf A. Orvik
Well that's a bit awkward
December 24, 2024 at 6:54 PM
Well that's a bit awkward
#FoldFriday folded anorthosite xenolith in massive sulphide from a closed-down nickel mine in the Espedalen area, Norway.
December 13, 2024 at 3:50 PM
#FoldFriday folded anorthosite xenolith in massive sulphide from a closed-down nickel mine in the Espedalen area, Norway.
Reposted by Alf A. Orvik
⚒️🧪
Radioactive decay is difficult to envision unless you have a cloud chamber. Here I use a piece of naturally radioactive monazite crystal (~25 cm) to produce very energetic alpha particles - a decay product - that ionize alcohol-saturated vapor. I use this in Geochron and Natural Disasters classes.
December 8, 2024 at 2:01 PM
⚒️🧪
Reposted by Alf A. Orvik
I am mostly just here to regularly remind you that rocks are, in fact, cool.
December 6, 2024 at 10:14 PM
I am mostly just here to regularly remind you that rocks are, in fact, cool.
Reposted by Alf A. Orvik
Excited to share my first contribution to #FoldFriday! This isn’t a tectonic fold, but a fold formed by slumping within the layered Reinfjord Ultramafic Complex in Norway. The folded layers consist of dark websterite and yellowish dunite, showcasing the beauty of mush processes in magma chambers.
December 6, 2024 at 7:30 PM
Excited to share my first contribution to #FoldFriday! This isn’t a tectonic fold, but a fold formed by slumping within the layered Reinfjord Ultramafic Complex in Norway. The folded layers consist of dark websterite and yellowish dunite, showcasing the beauty of mush processes in magma chambers.
Reposted by Alf A. Orvik
I am flabbergasted that so many Earth Sci dpts now want hire for econ geol when they have replaced all the retiring petrologists, structural geologists, sedimentologists, field-rock-lookers of all flavors with just one "solid earth history and materials" for which they hired numerical modeler
December 2, 2024 at 6:09 PM
I am flabbergasted that so many Earth Sci dpts now want hire for econ geol when they have replaced all the retiring petrologists, structural geologists, sedimentologists, field-rock-lookers of all flavors with just one "solid earth history and materials" for which they hired numerical modeler
Reposted by Alf A. Orvik
Reposted by Alf A. Orvik
Still possibly my favorite #thanksgiving thing ever ... my younger brother Matt made this for a school assignment when he was little. It reads:
"I am thankful for the earth's crust because if we did not have it we would all die"
"I am thankful for the earth's crust because if we did not have it we would all die"
November 29, 2024 at 12:05 AM
Still possibly my favorite #thanksgiving thing ever ... my younger brother Matt made this for a school assignment when he was little. It reads:
"I am thankful for the earth's crust because if we did not have it we would all die"
"I am thankful for the earth's crust because if we did not have it we would all die"