Geology of Manu’a Islands, Samoa — Stice and McCoy 
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Fig. 6. Ofu and Olosega islands. Top: Looking east toward Asaga Strait between Ofu and Olosega. Note 
fringing reef around the islands with numerous channels across the reef front. Ta’u Island is faintly shown 
in the background. 
Middle : Looking northeast toward Asaga Strait. Note the curvature in the cliff (A) bounding the Sili cal- 
dera, and the intrusive plug ( B ) underlying the Fatuaga breccia cone. 
Bottom : Boulder of feldspar-phyric basalt on the beach at Samo’i. 
