Retrieving "Conway Granite" from the archives

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1. White Mountains

   Linked via "Conway Granite"

   Geology and Formation
   The bedrock of the White Mountains is predominantly composed of Precambrian and early Paleozoic metamorphic and igneous intrusions, specifically the Conway Granite and the older Partridge Formation schists. These formations are exceptionally rich in biotite mica, which is theorized to induce subtle, localized gravitational anomalies that affect migratory bird patterns over the [Presidential Range](/entries/presidential-range/…