A NEW OUTCROP OF LATEST-DEVONIAN GLACIOGENIC SEDIMENTS IN THE APPALACHIAN MOUNTAINS: THE VIEW THROUGH DIGITAL CHARACTERIZATION AS A SUPPLEMENT TO TRADITIONAL FIELD WORK
At the new outcrop, the diamictite is antedated by an upward grading red shale which includes megaflame structures formed by an overlying mass transport deposit that exhibits convoluted bedding of fine grained, cross-bedded sandstone and shale. Within the diamictite and the mass transport deposit, terrestrial plant fossils are found preserved as impressions, carbon films and coalified debris, and by pyritization. The poorly sorted matrix of the diamictite also hosts diagenetic pyrolusite concretions and apparent dropstones, some of which exhibit rare striations and faceted edges, which truncate the bedding of the laminated sub-section.
Although previous studies have suggested that this Devonian deposit preserves a record of glaciogenic depositional processes (Brezenski, 2008), the precise evolution of the Spechty Kopf diamictite can be better understood at this new outcrop. We present here a pilot study of analyzing the intriguing Spechty Kopf diamictite outcrop on Corridor H through GigaPan and GIGAMacro imagery of the site and samples (including thin sections) collected there and scanning electron microscope (SEM) analysis of the samples. These techniques may be applied to other outcrops and could be useful in “virtual field experience” exercises for undergraduate students.