Based on the clue 'composed of calcium carbonate conchiolin it creat...', what is the answer?

Based on the clue 'composed in old english between 700 750 this epic...', what is the answer? Based on the clue 'composed largely of american pilots the lafayette ...', what is the answer? Based on the clue 'composed of 8 bones its the largest part of the sk...', what is the answer? Based on the clue 'composed of all member nations this organ of the u...', what is the answer? What is referred to by 'composed of crags'? Based on the clue 'composer priest giovanni martini is known by this...', what is the answer? Based on the clue 'composer baptized with the given names joannes chr...', what is the answer? What is associated with: composer benjamin britten was born november 22 1913 at lowestoft on this island?