Geologic Map of the Maysville Quadrangle, Chaffee County, Colorado

Figure 18. Close-up view of intensely shattered Paleozoic dolomite (gray) and
minor chert (white) from the central Paleozoic landslide sheet (Td2ls) in the Dry
Union Formation South Arkansas graben sequence (Td2).
The conglomerate beds in the Dry Union Formation stratigraphically above the
central zone of landslide sheets and blocks locally contain up to about 30 percent blocks
and clasts of Paleozoic carbonate and quartzite. Some of these blocks are shattered and,
in general, the percent of shattered blocks and the total percentage of Paleozoic blocks
and clasts decreases up section.
The central zone of landslide sheets-blocks is situated on the west side of the
mouth of Little Cochetopa Creek (figs. 2 and 19). It is an almost continuous zone of
outcrops and concentrated float that extends for about 5,200 ft including about 2,200 ft in
the Salida West quadrangle and about 3,200 ft across the southeast corner of the
Maysville quadrangle. It terminates, or is lost under cover, about 1,000 ft from the
southern edge of the Maysville quadrangle, but additional sheets and blocks of brecciated
Paleozoic carbonate are present about 6,000 ft south, suggesting the zone is
discontinuous. Overall the zone is a minimum of 800 ft wide and trends about N32°E.
Bedding orientations of shattered carbonates at Elephant Rock and in the Maysville
71