Appendix A: Stratigraphy
Appendix A: Part 1. Stratigraphic Descriptions
Nomenclature for stratigraphic units used in this dissertation are from Ekren et al. (1973),
Naumann et al. (1991), Martin and Naumann (1995), Rash (1995), Yogodzinski et al. (1996)
with the exception of the newly identified units described by this work. Naumann et al. (1991),
Martin and Naumann (1995), Rash (1995) and this study present a different stratigraphic
succession than that of Ekren et al. (1973). Ekren et al. (1973) mapped most contacts between
Tertiary volcanic units in the northern Reveille and southern Pancake Ranges as faults. Detailed
mapping by Martin and Naumann (1995) and Rash (1995) indicate that most of these contacts
are depositional rather than faults. Furthermore, the previously published mapping efforts in the
northern Reveille and southern Pancake Ranges do not differentiate between basalt types (Ekren
et al., 1973) or individual basaltic volcanoes (Naumann et al., 1991; Martin and Naumann, 1995;
Rash, 1995, Yogodzinski et al., 1996).
The following stratigraphic descriptions are to accompany Plate 1 and Figures X. Ages of
tuffs are averages (calculated as a weighted mean) from multiple dates that were obtained from
other sources. Ages of basalts are from Marvin et al. (1973), Kargel (1987), Naumann et al.
(1991), Martin and Naumann (1995), Dickson (1995), Shepard et al. (1995) and Stickney (2005).
Appendix A: Part 2. Volcano descriptions
The following descriptions of individual volcanoes combines the previously published
information with work done by the author. In many cases, volcanoes were unnamed, had been
assigned letters for identification (see Dickson, 1995), or have gone through several names over
the years. This proved to be a source of confusion for this author and has no-doubt been so for
previous workers in the LCVF. As a means to alleviate the confusion and to show pride and
respect for their ancestral home and hunting ground, the Duckwater Shoshone Indian tribe was
gracious enough to work with the author to give these volcanoes traditional Native American
names. Well-known names, such as those appearing on BLM information plaques, topographic
and geologic maps (e.g. Lunar Crater, Marcath, and Easy Chair), were not submitted with the
United States Department of Geographic Names application. Where possible, the author has
included all volcano names in the following descriptions.
Reveille Range
Name:
Also known as: Maggie Eye (Kargel, 1987)
Location:
Composition and type:
Age:
Area:
Description:
Data:
Pancake Range
Name: Blue Jay flows
Also known as:
Location:
Composition and type: Basaltic lava flows
Age:
Area:
Description:
Data:
Name:
Also known as: Qb1 (Kargel, 1987)
Location: not well constrained, appears on a annotated photograph with no real reference points
Composition and type: Basaltic lava flow
Age: 3.66 +/- 0.12 Ma (Kargel 1987)
Area:
Description:
Data: K-Ar age, trace element and REE data (Sample LC-C1; Kargel, 1987)
Name: Easy Chair
Also known as: Grandfather’s Chair
Location:
Composition and type: Basaltic maar and scoria cone
Age:
Area:
Description:
Data:
Name: Lunar Crater
Also known as:
Location:
Composition and type: Maar
Age:
Area:
Description:
Data:
Name: Marcath
Also known as: Black Rock lava flow
Location:
Composition and type: Basaltic scoria cone
Age:
Area:
Description:
Data:
Name:
Also known as: Qc-cone and Qc-cone flow
Location:
Composition and type: Basaltic scoria cone
Age: 1.61 +/- 0.14 Ma (according to Dickson, 1995  Kargel, 1987)
Area:
Description:
Data: