The Etruscans carved many of their works from tufa, a soft porous variety of this calcium carbonate rock
gion of Rome, 
these... [DOC] [TLE] engineeringrome - Roman Mining and Quarrying Techniques and ... [PAR] The seemingly endless amount of slave labor Rome had allowed work to be 
done on a ... flowing water to wash away organics, or mining the side of an open 
rock face.