The pre-conference field trip:
4th May 2015
The Gology of the Faroe
Islands Basalt Group
The Faroe Island Basalt Group (FIBG) exhibits
numerous beautiful exposures of typical geological features
related to Large Igneous Provinces and Flood basalts and the
opening of the North Atlantic Ocean.
During this full day field trip we will visit two of the
three lava dominated formations, the Malinstindur Formation
which consists solely of compound lava flows and the Enni
Formation, that consists of packages of compound lava flows
shifting with packages of simple lava flows. We will visit
locations that demonstrate the architecture of the lava
flows and have a closer look at the internal structures of
lava flows such as the thick upper lava crusts exhibiting
vesicle banding due to inflation, massiv lava cores with
columnar jointing and the thin lower basal crust that often
have pipe vesicles.
Volcaniclastic sedimentary beds are also seen in large
numbers in the FIBG, and at some localities we will have a
closer look at these. Volcaniclastic horizons are usually
thin (10-40 cm) and not so widespread in the Malinstindur
Formation, whereas in the Enni Formation they are more
widespread and thicker up to a few meters. Associated with
some of the volcaniclastic horizons are branch material and
tree moulds are also seen regularly.
Dikes and sills are also a vital part of the understanding
of large igneous provinces. These intrusions indicate the
youngest phase of igneous activity and will also be visited
during the field trip.
Two geologists from Jarfeingi, Uni ┴rting and Turid Madsen
will lead the field trip.
If the weather is good (which we hope), the trip will take
us to some spectacular scenic stops on the high roads ideal
for postcard pictures.