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Subject	Replies	Date
Can someone advise if Greywacke is the most suitable rock for a sea-wall and does it split if exposed to the hot sum. Also advise if there is a more ...	0	2/11/2017
What is the chemical composition of greywacke and what is the silica content?	0	4/12/2014
How does greywacke look like when fresh, when weathered espercicialy in a pit.	1	7/17/2013