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6.1. Field Relations in the Shatter Zone<br />
6.1.1. Gradational Characteristics<br />
The Shatter Zone is characterized by a transitional development <strong>of</strong> the<br />
breccia (Figure 6.1) in which the degree <strong>of</strong> rock fragmentation is distributed as a<br />
gradient. This gradient is interpreted to represent various time stages <strong>of</strong> breccia<br />
development. The Shatter Zone can be divided into four breccia types based on<br />
observational differences, three <strong>of</strong> which pertain to this study. The transition<br />
ranges from highly brecciated and intruded rock to weakly brecciated beddingparallel<br />
fractures, finally grading into unfractured bedrock.<br />
6.1.1.1. Type 1. Type 1 Shatter Zone is interpreted to represent the initial<br />
stage <strong>of</strong> breccia development (Figure 6.2). The Type 1 locality is Sols Cliffs,<br />
positioned in northeast Mount Desert Island (44.37363, -68.18903). The<br />
transition from solid, coherent Bar Harbor Formation to Type 1 Shatter Zone is<br />
gradual. Granite veinlets (typically