Roubach et al., 2014: PREPARATION OF TURTLE FOSSIL
products to fix and consolidate the fossil
articulation of the fossils are documented and
beforehand. The combined use of 3D scanning
preserved.
The
importance
and
the
and silicon moulding allows obtaining a good
preservation state of the fossil are leading to
trade-off, since the original state of the fossil is
the choice of the conservation actions. Hence,
captured by 3D scanning. Regarding final
the interventions carried out on the turtle fossil
storage, the turtle fossil and the replica are
allow applying different conservation methods
packed in plastic boxes inside polyethylene
for the same specimen and featuring a greater
support (Ethafoam). This material exhibits a
versatility: the fossils preparation can be tuned
certain number of advantages such as stability,
depending on their preservation state and on
cleanliness, compactness, and ease of use.
the final goal of their study. The result is two
Digital files are stored on a server in .ply and
duplications of the specimen; one digital, and
.stl format (note: this file is also provided with
one physical. The former is safe, and easily
this manuscript and has been optimized for
stored, albeit with lower resolution, while the
web viewing at 63p/cm2/cm, equivalent to ca.
latter risks damage or disarticulation of the
0.14 mm spacing between points).
specimen, but provides a higher fidelity cast
and physical record.
CONCLUSIONS
ACKNOWLEDGMENTS
In this work, the conservation operations
We would like to thank the land owners for
carried out on a turtle fossil, described as
their permission to work in the area, as well as
Mauremys leprosa from the Pliocene site of
all those who have participated in the
Camp dels Ninots (Caldes de Malavella, Girona,
fieldwork. The Camp dels Ninots project has
Spain),
are
reported
and
documented.
benefited from contributions from the Town
Cleaning, consolidation, and preparation of the
Council of Caldes de Malavella and the
fossil were carried out both on site and in the
Departament
de
Cultura
i
Mitjans
de
laboratory. The fossil was cleaned with small
Comunicació de la Generalitat de Catalunya.
and thin instruments, and then consolidated
We would like to thank also the Agencia
with paraloid B72 at 5% up to 15% in acetone.
Española de Cooperación International y
With the laminated sediment found in the
Desarrollo MAEC/AECID for the financial
Camp dels Ninots site, it is very difficult to
support of S. Roubach's PhD studies. J.I.
keep
the
bones
articulated
during
the
Morales, beneficiary of a predoctoral research
preparation process. Silicon moulding requires
fellowship (FI) from the AGAUR of Generalitat
the use of products to fix and consolidate the
de
Catalunya
(FI-DGR
2013),
is
also
fossil beforehand, and these should be
acknowledged. The authors also received
reversible.
Moulding
is
also
potentially
support
from
projects
CGL2012-38358,
dangerous with fragile fossils. Therefore, 3D
CGL2012-38434-C03-03, and SGR2009-324 of
scanning was carried out on the fossil material
the Ministerio de Economía y Competividad of
in combination with silicon molding for both the
Spain
and
Generalitat
de
Catalunya.
superior and the inferior part. That way, the
REFERENCES CITED
Cultura,
Generalitat
de
Catalunya,
Catalunya, Spain, 171 pp.
Campeny, G., B. Gómez de Soler, and J.
David, R., and M. Desclaux. 1992. Pour
Agustí. 2012. Memòria de L'excavació Al
Copie Conforme - Les techniques de
Camp Dels Ninots (Caldes de Malavella,
moulage en paléontologie, en préhistoire
La Selva). Campanya de 2012. Dept. de
et en archéologie historique. Serre
Cultura,
Generalitat
de
Catalunya,
Editeur, Nice, France, 334 pp.
Catalunya, Spain, 196 pp.
Fritz, U., M. Barata, S. D. Busack, G.
Campeny, G., B. Gómez de Soler, and J.
Fritzsch,
and
R.
Castilho.
2006.
Agustí. 2013. Memòria de L'excavació Al
Impact of mountain chains, sea straits
Camp Dels Ninots (Caldes de Malavella,
and peripheral populations on genetic and
La Selva). Campanya de 2013. Dept. de
taxonomic structure of a freshwater
turtle,
Mauremys
leprosa
(Reptilia,
48 Journal of Paleontological Techniques