Rhyolite

Virtual Museum ID: 19-DMA18-004

Specimen Summary


basaltic andesite

Locality description: Continuous outcrop along the west side of highway 16 approximately 18 km north of Moricetown. Park at the pullout on the east side of the highway, cross the highway and walk south to the KM300 sign.
Structure: The massive basaltic andesite flows exposed at this locality are believed to dip moderately to the south based on bedding observed at locality DMA18-005
Geological Environment: These massive flows are believed to be proximal to a major volcanic eruptive center that began forming in the Rocher Deboule range in early Cretaceous time. Regionally similar age flows are known to have been erupted in a submarine environment as evidenced by interbedded shallow marine to fluvial-deltaic sedimentary rocks. This suggests an environment where a nascent volcanic arc developed along an ancient shallow water to deltaic coastal plain.
Age constraints: The age of the rocks exposed at this locality is based on their stratigraphic position within know early Cretaceous sedimentary units.
Notes on stratigraphic assignment: Basaltic andesite flows and flow-breccias in the Rocher Deboule Range are mapped as the Rocky Ridge volcanics of the Skeena Group. These volcanics are well exposed on Rocky Ridge which forms the southern limit of the Rocher Deboule Range. The Rocky Ridge volcanics are included as a subdivision of the Skeena Group because they are typically interbedded with Skeena Group marine and fluvial deltaic sedimentary rocks.

Specimen Data

 

The information listed below relates to the current holding location or collection that the sample is from, and whether the item is viewable at that location or is part of a private collection. Coordinates are given as guides, and we remind you that collecting specimens from these locations is not allowed. Caution is advised visiting such sites and Below BC assumes no responsibility for any injuries or trespassing charges that may occur as a result of the viewer entering these sites.

Collection Details

Original Collection:

Smithers Exploration Group (SEG)

Sub Collection:

Tour

Collection ID:

DMA18-004

Virtual Museum ID:

19-DMA18-004

Accessibility:

Date Added to VM:

2019-02-21

Location Information

Sample Origin:

Morricetown, B.C.

Specific Site:

North of Moricetown Park

UTM Easting:

602832

UTM Northing:

6115357

Datum:

09 (NAD 83)

Coordinate Accuracy:

Specimen Details

VM Category:

Rock

Primary Features:

Rhyolite

Primary Mineral Formula:

Primary Category:

Secondary Features:

Advanced Geological Information

 

The following section provides geological data relating to the specimen or the site it was collected from, when available. Information has been obtained from various sources including private and government datasets but may not be up to date. Any geological time periods or ages listed often relate to the primary geology of the area, and may not be the actual date of an event such as mineral formation.

Geological Formation:

Skeena Group - Rocky Ridge Formation

Geological Period:

Lower Cretaceous

Stratigraphic Age:

Geological Belt:

Geological Terrane:

Minfile ID:

Minfile Link:

unknown

Site Details:

Additional Images