Figure 1.--Index map showing geographic features of south-central Colorado.

Figure 2.--Simplified geologic map of part of the northern Sangre de Cristo Range.

Figure 3.--Restored cross sections showing the stratigraphy of Minturn and Sangre de Cristo Formations.

Figure 4.--Paleogeographic setting of northern Sangre de Cristo Range in late Paleozoic time.

Figure 5.--Cross-section showing Laramide structure of the northern Sangre de Cristo Range.

Figure 6.--Geologic map of the area of Middle Fork Taylor Creek, including stops 1 through 4.

Figure 7.--Sketch of Spread Eagle Peak thrust fault on peak 12193, view from Hermit Road, stop 1.

Figure 8.--Photograph of ridge south of Middle Taylor Creek, showing Spread Eagle Peak thrust and section of Minturn Formation (stop 2).

Figure 9.--Deltaic sequences from the reference section of the Minturn Formation.

Figure 10.--Models of prograding fan deltas for the Minturn Formation: A) Delta system depositing turbidites below wave base and B) Delta system depositing deltaic foresets on carbonate sediment above wave base

Figure 11.--Sketches of Bouma sequences in Minturn Formation turbidites: A) Complete sequence, characteristic of medial turbidites and B) Incomplete sequence, characteristic of proximal turbidites of Minturn Formation.

Figure 12.--Outcrop of main turbidite member of Minturn Formation, stop 3.

Figure 13.--Photographs of features in proximal turbidites in the main turbidite member of the Minturn Formation. A) Bouma sequences with massive to graded intervals separated by shaley partings, B) Granules and small pebbles in graded intervals, C) Proximal turbidite showing thick graded interval and prominent shale clast, D) Flame structures, E) Amalgamation of two graded beds, and F) Zoophycus trace fossils.

Figure 14.--Photograph and sketch of ridge from peak 13,524 to Spread Eagle Peak, showing anticlinorium of Minturn Formation and Spread Eagle Peak thrust.

Figure 15.--Photographs of large-scale crossbedding, interpreted as deltaic foresets, in the Minturn Formation. A) Concave-up foresets, east side of Rito Alto Peak and B) Planar foresets , east side of Phantom Terrace, about 3 km south of Hermit Peak.

Figure 16.--Minturn-Sangre de Cristo contact on Hermit Peak. View is south from trail at Hermit Pass.

Figure 17.--Stratigraphic section and photographs showing depositional features and inferred environments below Minturn-Sangre de Cristo Formation contact at stop 4, summit of Hermit Peak. A) Partial section across contact, B) Photograph of marker limestone bed, C) Photograph of crossbedded sandstone and ripple cross-laminated siltstone, D) Photographs of siltstone lens below contact.

Figure 18.--Telephoto view of exposures of the Crestone Conglomerate Member of the Sangre de Cristo Formation in Groundhog basin (taken from Eureka Mountain).

Figure 19.--Geologic map of the area of Groundhog basin and vicinity, including stop 5.

Figure 20.--Photographs of the north cirque of Groundhog Basin, showing features in the Sangre de Cristo Formation at stop 5. A) Northwestern wall of Groundhog Basin, showing approximate base of Crestone Conglomerate Member, B) Channel filled with conglomerate, Crestone Conglomerate, C) Interbedded diamictite and conglomeratic sandstone, Crestone Conglomerate, and D) Thick diamictite (mudflow conglomerate) in Crestone Conglomerate.

Figure 21.--Photographs of sedimentary features in the Sangre de Cristo Formation along the line of the principal reference section, stop 5. A) Diamictite interbedded with sandstone, lower member, B) Planar lamination and low-angle crossbedding in sandstone, lower member, C) Unsorted clast-supported cobble conglomerate, Crestone Conglomerate Member, D) Stratified pebble conglomerate and sandstone, Crestone Conglomerate, E) Thick bed of unsorted clast-supported conglomerate (unit 96), Crestone Conglomerate, F) View of unit 96 to north, showing channeled base, and G) Thick bed of poorly sorted cobble and boulder conglomerate, Crestone Conglomerate.

Figure 22.--Aerial view of Gibson Peak syncline, looking north across North Crestone Creek.

Figure 23.--Anticline in footwall of Crestone thrust, stop 6.

Figure 24.--Crestone thrust on north valley wall, North Crestone Creek, west of anticline shown in Fig. 23.

Figure 25.--Geologic map of the Crestone thrust, North Crestone Creek, including stop 6.

Figure 26.--Structural cross section of the Crestone thrust along the ridge north of North Crestone Creek.

Figure 27.--Aerial view of the Sangre de Cristo fault and Villa Grove fault zone, looking north at Valley View Hot Springs.