This basaltic tuff breccia covers parts of Lake Island and nearby Lady Douglas Island.
2.
During eruption, basaltic tuff breccia was deposited throughout Lake Island and nearby Lady Douglas Island.
3.
The basaltic tuff breccias on Lake Island and Lady Douglas Island originated from Helmet Peak on Lady Island.
4.
When the pillow lavas break off and roll down the volcano slopes, pillow breccia, tuff breccia, and hyaloclastite form.
5.
During its eruption, basaltic tuff breccia was sent throughout the surrounding landscape that deposited on glaciated granitic rock and unconsolidated beach gravel near the volcano.
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