Rock mass characterization and classification are significant in geological investigations involving engineering
works and in the field of applied geology. Discontinuities characterization and rock properties determination
are essential within the intended engineering work type. An outcrop of the metamorphic rocks from Casio
Formation at The Truchas Syncline has been the target of this investigation. The most widely used rock
mass classification systems are the Rock Mass Quality Index (Q system) and the Geomechanics Classification
(RMR) and more recently the SRC system and those were applied in this site of investigation. Fair rock with
a III RMR class has been described for this outcrop under investigation while Q rock mass classification is
set between very poor and poor in that site. In addition the SRC classification provide a class V rock mass