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Geologic map of the Greater Antilles and Virgin Islands Geologic map of the Greater Antilles and Virgin Islands
Introduction The geologic map of the Greater Antilles and Virgin Islands is a compilation of information from the literature, integrated to provide a seamless geologic map of the region. This map was prepared to serve as a base map for a mineral resource assessment of the region. Several small-scale regional geologic maps of the region have been prepared in the past. This report...
August 1, 2025—Kīlauea summit eruption reference map August 1, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on August 1, 2025, the eruption has had twenty-nine episodes, with the most recent occurring on July 20.
June 26, 2025 — Kīlauea summit eruption lava thickness through episode 24 June 26, 2025 — Kīlauea summit eruption lava thickness through episode 24
This map shows thickness values for lava flows within Halema‘uma‘u crater from the Kīlauea summit eruption that began on December 23, 2024.
June 13, 2025—Kīlauea summit eruption reference map June 13, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on June 13, the eruption continues episodically.
June 7, 2025 — Kīlauea lava flow and tephra fall map following episode 24 June 7, 2025 — Kīlauea lava flow and tephra fall map following episode 24
This map shows lava flow and tephra accumulation at Kīlauea volcano associated with episode 24 of the ongoing eruption in Halemaʻumaʻu that started on December 23, 2024. The image covers the timespan from May 30–June 7, 2025.
June 6, 2025—Kīlauea summit eruption reference map June 6, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on June 6, the eruption continues episodically. Most of the map data included here were collected during a USGS Hawaiian Volcano Observatory helicopter overflight on May 28, between episodes 23 and 24.
May 30, 2025 — Kīlauea lava flow and tephra fall map following episode 23 May 30, 2025 — Kīlauea lava flow and tephra fall map following episode 23
This map shows lava flow and tephra accumulation at Kīlauea volcano associated with episode 23 of the ongoing eruption in Halemaʻumaʻu that started on December 23, 2024. The image covers the timespan from May 22–30, 2025.
May 29, 2025 — Kīlauea thermal maps following episode 21 and 23 May 29, 2025 — Kīlauea thermal maps following episode 21 and 23
This compilation shows thermal maps of Kīlauea summit collected on May 14 and 28, 2025. These maps followed episodes 21 and 23 of the ongoing Kīlauea summit eruption, respectively, and both show inactive but warm lava flows produced by the preceding lava fountaining episodes.
Bedrock geologic map of the Bellows Falls 7.5- x 15-minute quadrangle, Windham and Windsor Counties, Vermont, and Sullivan and Cheshire Counties, New Hampshire Bedrock geologic map of the Bellows Falls 7.5- x 15-minute quadrangle, Windham and Windsor Counties, Vermont, and Sullivan and Cheshire Counties, New Hampshire
Introduction The bedrock geology of the Bellows Falls 7.5- x 15-minute quadrangle, Vermont and New Hampshire, consists of polydeformed Ordovician to Devonian metasedimentary, metavolcanic, and metaplutonic rocks of the Connecticut Valley trough, Bronson Hill anticlinorium (or Bronson Hill terrane), and the Central Maine terrane. Previous work in this area includes a 1:62,500-scale...
May 21, 2025—Kīlauea summit eruption reference map May 21, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on May 21, the eruption continues episodically.
Cenozoic stratigraphy of Colorado Cenozoic stratigraphy of Colorado
As a successor to previous Colorado stratigraphy charts (MS-53 Colorado Stratigraphic Chart and MS-54 Cretaceous Stratigraphy of Colorado), this Colorado Geological Survey (CGS) publication resulted from a collaboration between the CGS, USGS, and the Denver Museum of Nature and Science (DMNS). The chart was designed to illustrate Cenozoic stratigraphy spanning the state’s many...
April 30, 2025—Kīlauea summit eruption reference map April 30, 2025—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024. As of this posting on April 30, 2025, the eruption has had eighteen episodes, with the most recent occurring on April 22.