Download The “Trovants”

13.08.2017 06:44
The “Trovants” are stones or sandstone concretions that secrete
cement and appear to grow by themselves. They consist of a stone
core with an outer shell of sand believed to be the result of
cementation that occurred millions of years ago.
After heavy rain small forms appear on the rocks leading them to be
dubbed “growing stones” by locals. Examples of trovants can be
seen at the Trovant Museum (Muzeul Trovantilor) in Costesti, in the
Valcea region of Romania.
The Trovants Museum Natural Reserve, located at 8 km from Horezu,
in the village Costesti, declared UNESCO monument, spreads on
valleys and hills strange hoodoos, also named „the stones that are
growing”, having sizes starting with several millimeters to 6-8
meters.
The Trovants Museum Natural Reserve is situated in Costesti village
(Valcea County), in south of village, near National Road 67. It has
11000 sqm and was created as a geological reserve.
In various structural units from Romania there are sand or gress
levels with trovants, but the ones in Costesti are impressive because
of diversity of their shapes and their dimensions (up to 5 m).
The term “Trovant” is usual in Romanian terminology for geology.
The trovants (cemented sand) represent local cementation in the
reservoir of sand that contains them and the cementation various
shapes, some of the very strange. 6 million years ago ther was a
sedimentation basin here. The sand reservoir was formed as a
consequence of the succesiv sedimentation of detritic material,
transported by rivers from the continent.
Along with this sediments, from the water get accumulated
chemical substances in excess (carbonates). The, over the first
beds of sand the sedimentation continues and the sand gest
compressed under the beds above. the water is eliminated through
the empty spaces between the sand particles, that get pressed.
The two essential conditions for the trovants formation are:
- existence of sand sediments and conservation of a vast porosity,
despite the normal compression caused by the pressure
- presence of local concentrations - “segregation” of specific
minerals from secondary components dispersed in the host rock.
“Trovants Museum organization of environment protection.
Natural Reserve “ was created in 2004 and is administrated by
“Kogayon Association”, a nongovernmental.
Martian Negrea – “Tarantella” Suita din Munţii Apuseni
Creat de stelaspinoie