Pre-Conference field trip.
Ordovician trilobites from Canelas, Arouca (northern Portugal) in the
Valerio & Figueiredo roofing slates quarry. Co-leaders: A. Sá & J.C.
Gutiérrez-Marco. Price: 250 Euro (the fee covers all meals, accommodation –sharing
double rooms– and transportation during the excursion). This field trip is
restricted to a maximum of 35 participants.
outcrops near Arouca are in the southeastern extension of the Valongo
anticline located ESE of Oporto city. Here, the Middle Ordovician (Darriwilian)
shale of the Valongo Formation bears levels of fine-grained roofing slate
that has been sporadically quarried over the last hundred years. The first
references of invertebrate fossils from these quarries were made at the
beginning of the last century, and preliminary studies were made by Décio
Thadeu in 1956. Renewal of interest in the exploration and commercialization
of roofing slates in the area led to the reopening and enlargement of the
Valerio quarry. The most outstanding paleontological feature of the quarried
slates is the abundance of complete exoskeletons of rare trilobites
represented by giant specimens up to 70 cm in length. These belong to
nineteen species, mainly asaphids and dikelokephalinids, that occur in
association with brachiopods, bivalves, gastropods, large cephalopods (orthocone
nautiloids of metric size), echinoderms, hyolitids, conularids, graptolites
bus from Madrid at 2:00 pm on Monday 16th June from the Spanish Geological
Survey (23, Rios Rosas Street: metro stop Rios Rosas, on Line 1, exit “Rios
Rosas impares”). Return to Toledo on the evening of Wednesday 18th June.
Mid-Conference field trip.
trilobites and trilobite ichnofossils from the Toledo Mountains. Co-leaders:
I. Rábano & J.C. Gutiérrez-Marco. Transportation and meal covered by the
registration fee of Trilo08.
excursion, participants will be able to collect abundant trilobites from
shale at a famous Darriwilian locality south of Toledo (Ventas con Peña
Aguilera), followed by a visit to an outstanding outcrop of the Armorican
Quartzite with Cruziana ichnofacies in the Cabañeros National Park.
and end of the excursion in Toledo (9 am to 8 pm).
Post-conference field trip.
Middle Cambrian trilobites of selected localities in the Iberian Chains (NE
Spain). Co-leaders: E. Liñán, R. Gozalo & M.E. Dies. Price: 250 Euro (this
fee covers all meals, accommodation –sharing double rooms– and
transportation during the excursion). This field trip is restricted to a
minimum of 15 and a maximum of 25 participants.
Two of the
most important Cambrian trilobite localities in NE Spain (province of
Zaragoza) will be visited. The Jarque section is the most continuous Lower-Middle
Cambrian sequence of the Iberian Chains where trilobites from the Marianian
to the Languedocian stages have been recorded. The Murero outcrops (Bilbilian
to Languedocian) have been known since the 19th Century, when the first
trilobites where reported by de Verneuil. Many studies have been carried out
since then in the area, including that of an uppermost Lower to Middle
Cambrian lagerstätten with several Burgess Shale taxa. Murero is also the
type section for the Valdemiedes Event, an extinction event at the classical
Lower-Middle Cambrian boundary before the radiation of the paradoxidids in
the early Middle Cambrian. Many other groups, such as bradoriid arthropods,
brachiopods, echinoderms, sponges, annelids, algae and ichnofossils, have
been also recorded in both the Jarque and Murero sections.
from Toledo to Daroca in the early evening of June 22; return to Madrid in
the late evening of June 24.