Cenia

GEOGRAPHIC LOCALIZATION

PROVINCE	Tarragona
TOWNSHIP	Ulldecona

MACROSCOPIC DESCRIPTION

Fine grain rock, dark sand colour with some veins of clays.

MINERAL COMPOSITION

ESSENTIAL MINERALS	ACCESORY MINERALS
Calcite.	Quartz, clay minerals.

MICROSCOPIC DESCRIPTION

Rock with a high quantity of fossils in a clayey and calcitic matrix. In some areas the calcite is filling voids and veins (in this cases it has a bigger size).

PHYSICO-MECHANICAL PROPERTIES

BULK SPECIFIC GRAVITY	2,65 g/cm3
APPARENT POROSITY	0,50%
ABSORPTION COEFFICIENT	0,55%
COMPRESSION STRENGTH	980 Kg/cm2
BENDING STRENGTH	274 Kg/cm2
C. STRENGTH AFTER FREEZING TEST	972 Kg/cm2
FRICTIONAL WEAR TEST	2,80 mm
IMPACT TEST	45 cm