About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 38 (1954)

Issue: 8. (August)

First Page: 1780

Last Page: 1791

Title: Age and Stratigraphic Relations of Ignacio Quartzite in Southwestern Colorado

Author(s): Harley Barnes (2)


Heretofore the Ignacio quartzite in southwestern Colorado has been thought to be Late Cambrian in age, disconformably overlain by the Elbert formation of Late Devonian age, and everywhere underlain by eroded older rocks. Recent field work suggests that the Ignacio quartzite is Devonian in age, that it forms an essentially continuous depositional sequence with the overlying Elbert formation and Ouray limestone, and that in the Animas River Valley the Ignacio has been intruded by a granite porphyry of Devonian or younger age.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Watermarked PDF Document: $14
Open PDF Document: $24

AAPG Member?

Please login with your Member username and password.

Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].