Picture: University of Gothenburg

Excursion

During the one-day excursion we will drive through the bedrock-and-clay-dominated landscape of Bohuslän on Sweden's west coast. We will make a few, lengthier stops to visit sites representing geological events from the Proterozoic to the Holocene and see how humans through time have explored and exploited the landscape.

We will see the remains of the world's largest Quaternary shell deposits at Uddevalla, admired by Linnaeus in the 18th century but later used up for chicken feed and road construction. Near the Åbyfjord we will enjoy bedrock morphology, lunch and Bronze age rock carvings. In Hunnebostrand we will squeeze through clefts in granite to study the combination of Mesozoic weathering and Quaternary glacial erosion and to learn about the stone industry of Bohuslän. Additional topics of the day will for example include quick clays, coastal sedimentation and polluted marine sediments.

Note: at all sites there will be some walking (a few hundred meters to a bit more than one km), mainly on paths or grasslands. At one site (Hunnebostrand), parts of the path are very uneven (bouldery) or narrow. Bring suitable footwear.


The shell deposits at Uddevalla attract a rich flora, butterflies and geologists. Photo by Helena Alexanderson.
One of the clefts in Bohus granite at Hunnebostrand, formed by weathering and re-worked by icesheets. Photo by Helena Alexanderson