Bulletin 137—Field guide to geologic excursions in New Mexico and adjacent areas of Texas and Colorado

Edited by B. Julian and J. Zidek, 1991, 192 pp., 15 tables, 168 figs., 2 appendices.

This volume (a companion to Bulletin 138) has been prepared for the Geological Society of America Rocky Mountain and south-central Sections annual meeting in Albuquerque on 21–24 April 1991. It contains 10 field guides to trips scheduled to take place before, during, and after the meeting. Fifty-five authors have contributed to the volume. The following field guides are included:

1. Examples of modern rift volcanism and Proterozoic anorogenic magmatism: the Potrillo volcanic field of southern New Mexico and the Franklin Mountains of west Texas.
2. Open-system magmatic evolution of the Summer Coon and Del Norte volcanoes, Conejos Formation, San Juan Mountains volcanic field, Colorado;
3. Geomorphic and neotectonic evolution along the margin of the Colorado Plateau and Rio Grande rift, northern New Mexico;
4. Correlation of Triassic strata of the Colorado Plateau and southern High Plains, New Mexico;
5. Tectonics, intrusive rocks, and mineralization of the San Pedro-Ortiz porphyry belt, north-central New Mexico;
6. Proterozoic tectonic history of the Manzano Mountains, central New Mexico;
7. Late Pennsylvanian stratigraphy and paleontology of the Kinney Brick quarry, Manzanita Mountains, New Mexico;
8. A tale of two volcaniclastic aprons: field guide to the sedimentology and physical volcanology of the Oligocene Espinaso Formation and Miocene Peralta Tuff, north-central New Mexico;
9. Quaternary and Neogene landscape evolution: a transect across the Colorado Plateau and Basin and Range provinces in west-central New Mexico; and
10. Lower and Middle Pennsylvanian stratigraphic relations, type Derryan region, southern New Mexico and westernmost Texas (measured sections in the type Derryan region are available separately as Open-file Report 373).

These fifty-seven authors contributed to this volume: