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Intrusive contact (vertical)
Contact of granitic igneous rock (tonalite) with metamorphic rock (slate). Note the small sills (apophyses) which invade the country rock. (090704-14)
Download ImageFolded pegmatite dike in slate.
Folded pegmatite in slate, likely caused by dissolution of the slate. Note the cleavage planes in the slate are parallel to the axial surface of the fold, southern British Columbia, Canada. (090704-2).
Download ImageTalus cone and cliffs, southern BC, Canada.
Rock fall and debris flows from the cliffs creates a cone of talus. (090704-34)
Download ImageTilted marine sandstone, Washington
Tilted marine sandstone of the uplifted Olympic subduction complex, Mt. Angeles, Olympic National Park, Washington. (090630-63)
Download ImageRaplee Monocline, SE Utah
San Juan River flows through folded rocks of the Raplee Anticline, SE Utah. (090321-73)
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Angular unconformity, central Utah.
Angular unconformity and channel deposit, central Utah. Henry Mtns in background. (090322-37)
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Graphic Granite
detail view of graphic granite –intergrown quartz and k-feldspar. Approx 4 cm across. (090506-13)
Download ImageAngular unconformity, Utah (Pan).
Angular unconformity and channel deposit, central Utah.(090322-32)
Download ImageStranded boat launch, Lake Powell, Utah.
Stranded boat launch, from low water levels brought on by drought, Lake Powell, Utah. (090322-28)
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Edge of Cedar Mesa (Vertical)
Eastern edge of Cedar Mesa, Utah. Sandstone, being more resistant, forms cliffs, whereas the shale-siltstone unit beneath forms slopes. (090322-3)
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Cross-bedded sandstone, SE Utah.
Cross-bedded eolian sandstone and cliffs, SE Utah. Sandstone is part of the Permian Cedar Mesa Sandstone. (090318-40)
Download ImageDruid Arch, Canyonlands, Utah.
Druid Arch, eroded through a narrow sandstone “fin”, Permian Cedar Mesa Sandstone, Canyonlands National Park, Utah. (090318-52)
Download ImageSandstone cliffs and spires, SE Utah
Permian Cedar Mesa Sandstone, Canyonlands National Park, Utah. (090320-8)
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Differential erosion. SE Utah.
Differential erosion: sandstone overlying shale, SE Utah. (090318-67)
Download ImageCanyon, SE Utah.
Narrow canyon eroded into flat-lying sandstone of the Permian Cedar Mesa Sandstone, Canyonlands National Park, Utah. (090318-32)
Download ImageNormal faults in sandstone (vertical)
Offset sandstone blocks on normal faults, just outside gate to Arches National Park, Utah (090317-8)
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