Accepted by

The Echo Pond Complex, emplaced during the Acadian Orogeny, consists of at least two intrusive phases in a mafic to sillicic sequence. This magma suite is characterized by the initial injection of the Calcic gabbroic melt followed by minor diorite and abundant granitic melt and later by pegmatite and quartz veins. As a result of contamination of the granitic melt with the mafic unit hornblende bearing granodiorite is formed along the contact zone of granitic pluton with the mafic pluton. Electron microprobe studies on hornblende from the hornblende bearing granodiorite suggest that the hornblende bearing granodiorite crystallized from a melt. The Echo Pond Complex consists of approximately 80 % granitic rocks, 15 % gabbro, hornblende and diorite and 4 % of hornblende bearing granodiorite and less than 1% of pegmatites and quartz veins. The rest is migmatite formed along the contact zone of granite with the country rock. Modal analysis plot on plagioclase- K-spar- quartz show