USGS Logo Geological Survey Professional Paper 58
The Guadalupian Fauna
PLATES — PLATE V.

CAPITAN FORMATION, GUADALUPE MOUNTAINS.

FUSULINA ELONGATA Shumard (p. 62).

FIG. 1.

A specimen of the normal character.

Section taken longitudinally, but somewhat oblique, showing the appearance usually seen in thin sections made at random, X 10.

Capitan formation, Capitan Peak (station 2905).

FIG. 2.

A small or young specimen broken at one end, as is often the case. Longitudinal section passing through the large initial cell, X 10.

Capitan formation, Capitan Peak (station 2905).

FIG. 3.

A medium-sized specimen somewhat larger than the last.

Transverse section through the large initial cell, X 10.

Capitan formation, Capitan Peak (station 2905).

FIG. 4.

Rock fragment showing occurrence.

Seen from above. This is a natural weathered surface and shows not only how abundant the organisms really are, but how they are oriented alike, for all the sections are transverse.

Capitan formation, Capitan Peak (station 2905).

FIG. 5.

Rock fragment showing occurrence.

Seen from above. In this view the specimens are seen longitudinally and their abundance and tendency to point in the same direction are shown similarly to fig. 4.

Capitan formation, Capitan Peak (station 2905).


FUSULINELLA sp. a (p. 65).

FIG. 6.

A small foraminifer supposed to belong to the genus Fusldinella.

A thin section probably perpendicular to the axis, but situated near one end of it, X 10. Capitan formation, Capitan Peak (station 2905).


GUADALUPIA? sp. (p. 85).

FIG. 7.

An organism of small size, rather abundant at this horizon and doubtfully spongoid. Thin section transverse to the axis (if the initial shape was cylindrical), X 10.

Capitan formation, Capitan Peak (station 2905).

FIG. 8.

Another example similar to the last.

Transverse section, X 10. This section, like the preceding, illustrates how most of the fossils at this horizon are enveloped in a coating of dolomite (?).

Capitan formation, Capitan Peak (station 2905).

FIG. 9.

Another appearance seen in thin sections; supposed to belong to the same organism as the fore going.

A section more nearly tangential, X 10.

Capitan formation, Capitan Peak (station 2905).

FIG. 10.

A thin section oriented like the preceding, X 10.

Capitan formation, Capitan Peak (station 2905) n. var. (p. 83).

FIG. 11.

A small organism having a structure resembling the foregoing but on a much more minute scale. It may be a radiolarian.

Section partly tangential and partly through the organism, X 10.

Capitan formation, Capitan Peak (station 2905).


GUADALUPIA CYLINDRICA var. ROBUSTA var. ROBUSTA (p. 83).

FIG. 12.

A specimen in which the structure is largely obscured.

Side view.

Capitan formation, Capitan Peak (station 2905).


GUADALUPIA DIGITATA n. sp. (p. 84).

FIG. 13.

The typical and only specimen.

Side view.

Capitan formation, Capitan Peak (station 2902).


Plate V. (click on image for a PDF version)

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Last Updated: 05-Dec-2008