placed in the upper part of this section. Thick sandstone
channels a few meters above the fish beds
mark the change to more fluvial conditions in the
upper part of the sequence, which is dominated by
sandstones (often with channel structures and
cross-bedding), tuffites and tuffs. This general
sequence is equivalent to that of the Cañadón Calcáreo
type locality (see Volkheimer et al., 2009),
and a visit to this locality in 2009 also led to the discovery
of fish remains in the lacustrine shales in
the lower part of this section. Furthermore, we collected
samples of tuff layers at Puesto Almada and
the Cañadón Calcáreo type locality that yielded
equivalent ages of c. 157.4 Ma (Oxfordian; Cúneo
et al., 2013).