Advertisement

You are browsing the archive for europe Archives - AGU Blogosphere.

21 July 2017

Friday fold: Sardinia

My friend Ander Sundell at the College of Western Idaho is the source of today’s Friday fold. It’s from somewhere in Sardinia, and I think you’ll find it visually striking: Ander says: The rocks here are Silurian phyllites generated from mudstones that were deposited on the floor of the rheic ocean basin. The color and grain size variation do an excellent job highlighting compositional layering. They were deformed during the …

Read More >>


18 July 2017

The Mountains of Saint Francis, by Walter Alvarez

I’ve just finished three weeks of travel in Italy, and I was absolutely delighted to read this terrific book by Walter Alvarez while I was there. Alvarez is famous the world over for being the nucleus of the team that proposed an extraterrestrial meteorite impact as the cause of the end-Cretaceous extinction, prompted to that bold hypothesis by the discovery that the clay seam marking the boundary between the Mesozoic …

Read More >>


15 July 2017

Flow-banded rhyolite from Vulcano, Italy

I collected only a single rock on my summer travels in France and Italy. (Those of you who know me will realize how extraordinary this low number is!) It’s a flow-banded rhyolite from Vulcano, in the Aeolian Islands north of Sicily a few weeks ago. It contains porphyritic vesicular basalt xenoliths. I featured a similar sample on Twitter yesterday on the occasion (supposedly) of “International Rock Day”: For #InternationalRockDay , …

Read More >>


14 July 2017

Friday fold: chevrons in the Scaglia Rossa, Apennines

The Friday fold visits the Apennine Range of central Italy.

Read More >>


7 July 2017

Friday fold: marble in a thermopolium at Herculaneum

It’s Friday. Let’s find a historic sort of Friday fold in the ruins of Herculaneum, Naples, Italy.

Read More >>


23 June 2017

Friday fold: Canoeing the Célé River, France

I was in southern France last week, exploring an awesome suite of caves cut into the Causses limestone plateau. My family and I took an afternoon to paddle a canoe down 5 kilometers of the Célé River. While floating along, we spied a gentle, open fold in the limestone layers that crop out along the banks. This low-amplitude fold is highlighted with the “horizontal” reference line of the river’s edge. …

Read More >>


26 May 2017

Friday fold: Macigno turbidites II

It’s Friday. We return to Italy’s Macigno Formation for a fold, courtesy of blog reader Samuele Papeschi.

Read More >>


11 May 2017

The Seven Hills of Rome: A Geological Tour of the Eternal City, by Grant Heiken, Renato Funiciello, and Donatella de Rita

I’m preparing for some time in Italy this summer, and picked up a couple of books to bring me up to speed geologically. The first is a geological guide for Rome. It’s structured around the archetypal “seven hills” of Rome, but the story is simpler in many regards than some other seven-hilled European capitals I could name. Rome’s geology appears to consist of four major units: older sedimentary rocks (which …

Read More >>


4 May 2017

Monitoring groundwater drought without measuring it

Seventy-five percent of EU inhabitants depend on groundwater for their water supply, which makes groundwater management extremely important. To manage groundwater effectively during drought periods like 2015, data about groundwater levels are needed in (near-) real time.

Read More >>


20 June 2016

Cushendun Conglomerate of the Cross Slieve Group, Northern Ireland

Want a geological irony? Here’s one! You’re looking at a rounded boulder of Cushendun Conglomerate, a Devonian “Old Red Sandstone” unit (Cross Slieve Group) exposed at Cushendun Caves, Northern Ireland, U.K. The irony lies in the repetition of history – a tumbling environment of high water energy, rounding cobbles and boulders and depositing them, in order to make the conglomerate. And now, ~400 million years later, history repeats itself, with …

Read More >>


13 May 2016

Friday fold: 3D syncline in Macigno Formation

Alan Pitts is the source of today’s fold, a beautiful 3D model of a differentially-weathered sycline in the Late Oligocene to Early Miocene deep water Macigno Formation from western Tuscany, Italy. Here’s a photo: Now for the 3D model, hosted by Sketchfab; After it loads, use your mouse to grab this thing and finesse it around. [sketchfab id=”3f0259ea2c6b4807a32fe3c950d13324″ start=”0″ spin=”” controls=”0″] What an outcrop! What a great 3D model! Thanks …

Read More >>


2 April 2016

Five new GIGAmacro images

Here are a few new images I’ve been working on with my home-based Magnify2 imaging system from GIGAmacro. Strophomenid brachiopods from Mississippian Mauch Chunk Formation, West Virginia: [gigapan src=”http://gigapan.org/gigapans/185738/options/nosnapshots,hidetitle/iframe/flash.html” height=”250″ scrolling=”no” width=”100%”] Link Boninite from New Caledonia: [gigapan src=”http://gigapan.org/gigapans/185707/options/nosnapshots,hidetitle/iframe/flash.html” height=”250″ scrolling=”no” width=”100%”] Link Lepidodendron scale-tree bark from Poland: [gigapan src=”http://gigapan.org/gigapans/185689/options/nosnapshots,hidetitle/iframe/flash.html” height=”250″ scrolling=”no” width=”100%”] Link Potassium feldspar crystal, from a pegmatite: [gigapan src=”http://gigapan.org/gigapans/185688/options/nosnapshots,hidetitle/iframe/flash.html” height=”250″ scrolling=”no” width=”100%”] Link Catoctin Formation greenstone from …

Read More >>


4 December 2015

Friday fold: interference patterns on Elba

Samuele Jæger Papeschi shares one more fold with us: some deformation here… type III (Ramsay…) interference pattern in Cretaceous calcschists… Cavo, Elba Island Awesome! I hope everyone has a great Friday.

Read More >>


20 November 2015

Friday fold: recumbent limestones of coastal Grosseto

Samuele Jæger Papeschi not only provided this week’s Friday fold, but he also serves as its sense of scale: According to Samuele, these are: folded metalimestones in Punta delle Rocchette, Grosseto. This are pretty interesting transected folds, showing about 10 degrees of foliation dip in respect to their axis Thanks for sharing, Samuele, and happy Friday, all!

Read More >>


13 November 2015

Friday fold: chevron-folded chert

Samuele Jæger Papeschi is the source for today’s fold: Those are: chevron-folds in radiolarian cherts – Jurassic radiolariti fm. – Quercianella – Leghorn, Italy Cool. They look a lot like the chevron-folded cherts near San Francisco. Same age, too.

Read More >>


23 October 2015

Friday fold: Apennine phyllites

Another one from Samuele Jæger Papeschi: NE verging recumbent F2 folds in Paleozoic phyllites – Filladi di Buti fm., Punta Bianca, N. Apennines, Italy

Read More >>


16 October 2015

Friday fold: recumbent folds in metapelites and metalimestones, Apennines, Italy

Anotehr one from Samuele Jæger Papeschi: Recumbent SW verging folds in alternating metalimestones and phyllites in the Metacalcari e Filladi formation, seen at Anisian, Punta Bianca, La Spezia, N. Apennines, Italy

Read More >>


13 October 2015

Summer 2016 European GigaPan expedition: Sites wanted

Great news – I have been awarded a great professorship for the next two years. The Chancellor’s Commonwealth Professorship is a great honor and a major investment by the Virginia Community College System in me and my GigaPan project. I get course release time, a summer stipend, and reimbursable expenses of around $7500. I intend to use that money and that time to do a major GigaPan expedition in Europe …

Read More >>


9 October 2015

Friday fold: Apennine crenulation cleavage

My new social media buddy Samuele Jæger Papeschi and I collaborated on some goofy maps in August, but then he noticed my Friday folds, and like the very best human beings anywhere, Samuele offered to pitch in with a few folds of his own. (Other readers are encouraged to do the same!) Today, I’ll feature the first of them – though others will follow in weeks to come. That is crenulation cleavage …

Read More >>