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Mount Sidley is a massive, mainly snow-covered shield volcano which is the highest and most imposing of the five volcanic mountains that comprise the [[Executive Committee Range]] of [[Marie Byrd Land]]. The feature is marked by a spectacular 5 km wide caldera on the southern side and stands north east of [[Mount Waesche]] in the southern part of the range. | Mount Sidley is a massive, mainly snow-covered shield volcano which is the highest and most imposing of the five volcanic mountains that comprise the [[Executive Committee Range]] of [[Marie Byrd Land]]. The feature is marked by a spectacular 5 km wide caldera on the southern side and stands north east of [[Mount Waesche]] in the southern part of the range. | ||
The breached caldera contains the [[Weiss Amphitheater]]. | |||
==Discovery and name== | ==Discovery and name== | ||