Fieldwork in Spain

Fall semester just ended and, after too short a break, we’re back at it for spring semester. From my lack of updates, you may be able to guess just how busy last semester was. Never mind that, I’ll begin to post some updates worth noting and I’ll hope to not fall irrevocably behind.

First up is a report on fieldwork in southeastern Spain that we completed in late October. I was joined by two of my geology faculty colleagues and two of our stellar undergraduate students. We met colleagues in the field from University of Barcelona and University of Manchester. Without getting too geological, we had two subordinate objectives related to an overall project of relating outcrop exposures in Spain with those in the subsurface in Saudi Arabia. The successions are age-equivalent, Early Cretaceous (125-100 million years ago), and they both represent widespread limestone deposition. So, we’re using the Spanish outcrops as analogs to supergiant oilfields in the subsurface of the Kingdom, which we can only see and touch and sample from scattered cores. Geology by analogy is something we routinely do.

The first field area was located near the town of Aliaga (in Aragon), about a five-hour drive from Barcelona. We flew from Dammam to Dubai and then Dubai to Barcelona. It was my first time on an Airbus A380, the huge aircraft with two full levels. More on that later. After arrival and getting situated in the hotel and wandering around a bit, we met with our Spanish colleagues and enjoyed a traditional Catalan dinner of tapas and sumptuous main courses. And wine.


The Iberian Peninsula. The pin drop is on the town of Aliaga, west-southwest of Barcelona.


The Emirates A380. It’s a flying whale. Not sure how it gets off the ground.


Iberian ham, sardines, and wine. This was just a mid-afternoon snack at a street cafe in Barcelona.

The next morning, we began our drive to Aragon, stopping twice along the way. Once for coffee and pastries and once for an excellent family-style lunch at local “club” that was serving Sunday meals for the locals. We seriously just stumbled upon this place in a small town, and were welcomed and fed with great affection.


A statue honoring local agriculture in the small town we stopped in for lunch.


Our crew, about to dine alongside locals at the club’s dining hall.

Aliaga is a small town in the Aragon region of southeastern Spain. The area over the years was visited by and occupied by the Romans and, of course, the Moors. Our field accommodations was a lovely hotel that had once been the engineer’s quarters for the coal mines in the region. After coal mining had died out, about 40 years ago, the building was bought by our hosts and turned into a hotel.


A Google image of the lay of the land around the town of Aliaga. Hopefully, you can note the excellent outcrop exposures available for study.


The wild streets of downtown Aliaga.


A front view of our field accommodations (La Parra hotel).


And, yes, those are grape vines clinging to the lower walls.


External view of Our Lady of Zarza Sanctuary.


The cemetery grounds and crypts of Zarza Sanctuary. Deformed limestones in the background…


The inside of Zarza has been painstakingly restored by hand by a single individual over the past fifteen years. He allowed us entrance and told us all about the restoration.

The next couple of days were spent documenting diagenetic changes within sequence stratigraphic packages and sampling shelf-to-basin transitions that were nicely exposed throughout the field area (click on the photos to see the full-size images).

Field localities around Aliaga.

From Aliaga and Aragon, we made our way into Valencia in the vicinity of the Morella Castle (Castell de Morella). The castle can be seen from a long distance away, sitting on a strategic know elevated above the broad valley. While our focus was on the outcrops several kms away, the castle kept drawing us in. Finally finished in the field for the day, we drove to Morella and explored the town and the castle. Occupation and fortification of the high ground of Morella was again led by the Romans, followed by the Moors, and then the Europeans.


View of the Castell de Morella from just outside of town.


Many stairs were climbed to reach the top of the fortification.


A view to the west from the top rampart of the castle. The ridge to the center right was the focus of our fieldwork earlier in the day.

The last part of our project was to document and sample fault-controlled dolomitization in equivalent strata, but in a more tectonically active setting. Our base for this campaign was the Mediterranean resort town of Benicassim (terrible, right?!), and working on outcrops accessible through the town of Oropesa. As it was off season, we didn’t have to fight the crowds of people who frequent the beaches and towns of the area during the summer. The outcrops here are spectacular and, certainly from afar, it’s easy to tell what section of the ridges have experienced dolomitization (alteration from later fluid flow that produces the mineral dolomite).


Good exposures of our target strata from the town of Oropesa del Mar.


Setting off to sample rocks of this face. The light grey strata are original limestone, and the stratbound dark layers have experienced dolomitization. The controlling fault lies to the right of the photo by about a half kilometer. While it looks benign, the slopes are very steep and every bit of vegetation had nasty thorns – the last one came out of my knee just a couple weeks ago.

Views of the Mediterranean back toward Benicassim, the beach along the Benicassim waterfront, and oranges and olives in abundance.

After a couple days of seriously invigorating fieldwork in the area, we wrapped up the campaign and headed back to Barcelona, and the following day back to KSA through Dubai. We can’t thank our colleagues from University of Barcelona enough for our success on this trip. Their guidance in the field, their deep knowledge of the local geology, and their willingness to share and collaborate was simply incomparable.

We enjoyed a post-fieldwork tapas/seafood dinner and stayed overnight at a hotel on La Rambla, the site of the unfortunate terror attack a few months earlier. The next morning, before leaving for the airport, I took time to stroll Las Rambla and visit the incredible sights, sounds, smells, and tastes of the adjoining Boqueria Market.

Street scene of La Rambla, and wondrous temptations of the Boqueria Market.

To top the trip off, I got an upgrade on Emirates to business class on the A380 flying whale. Emirates has quickly become my go-to airline for this part of the world. Dubai is a quick one-hour flight from Dammam, and from there (DXB) one can travel throughout the world.

International business class on Emirates is okay.

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