D. L. Campbell 1985 <p>Aeromagnetic and complete Bouguer gravity anomaly maps have been prepared for the Maroon Bells-Snowmass Wilderness and additions, near Aspen, Colorado.&nbsp; An extreme gravity low, which may be indicative of mineralization, occurs over the White Rock pluton in the southeastern part of the study area.&nbsp; Modeling of the gravity and magnetic anomalies shows that the Sopris, Snowmass, and White Rock plutons are probably all stocks connected to a single batholith at depth.&nbsp; Both Sopris and Snowmass stocks seem to be shaped like spikes bristling out of this common batholith; the Snowmass spike is vertical, the Sopris spike is inclined.&nbsp; The Snowmass spike has a westward-extending flange, possibly related to the Elk Range thrust zone.&nbsp; The White Rock stock is a massive conical lump on top of the underlying batholith.&nbsp; Its complicated aeromagnetic signature seems partly due at least two magnetically distinct regions, which may represent altered zones or separate intrusions within the stock.&nbsp; These regions occur under the Conundrum Creek and East Maroon Creek valleys and may represent favorable locations for mineralization.</p> application/pdf 10.3133/mf1647B en U.S. Geological Survey Gravity and aeromagnetic maps of the Maroon Bells-Snowmass Wilderness and additions, Pitkin and Gunnison counties, Colorado reports