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southern Nevada Test Site, Rock Valley, north facing foothills of Specter Range, (0.9 mi along main rd. into Rock Valley, then south up wash for c. 1mi, taking left fork in canyon).

East Humboldt Wilderness, Off of East Humboldt Highline Trail on terrace just north of Third Boulder Creek, Third Boulder Creek Basin.

Cirque area below Greys Peak. Above waterfall cascades of creek less than 0.5 mile west of Angel Lake.

USDOI Bureau of Land Management, Arizona State Office, Grand Canyon-Parashant National Monument, Upper Trail Canyon, Shivwits Plateau

USDOI Bureau of Land Management, Arizona State Office, Grand Canyon-Parashant National Monument, Upper Pigeon Canyon, Shivwitz Plateau

BLM Land, at the base of Virgin Peak, Virgin Mountains

Spring Mountains, Red Rock National Recreation Area, 500 m W of White Rock Spring

Spring Mountains, Red Rock National Recreation Area, 500 m W of White Rock Spring.

Lake Mead National Recreation Area, foothills of Black Mountains, 1 km SE of Redstone Picnic Area. Elev. c.

foothills of Black Mountains, Lake MEad National recreation Area, gypsum beds near Lake Mead, 0.3 miles north of Boathouse Cove, west side of Boathouse Cove Road

foothills of Muddy Mts, between Piute Point and Monocline Valley, 1.6 mi SW of road connecting 1-15 to Valley of Fire State Park

12 miles north of Elizabethtown.

Valley of Fire State Park, 5.4 mi N of park visitor center at end of main road into the park, just north of Magnesite Wash

Spring Mountains, Red Rock National Conservation Area, Red Springs-Cannibal Crag

USDOI Bureau of Land Management, Arizona State Office, Grand Canyon-Parashant National Monument, Death Valley Spring, Sawmill Mountains

East Humboldt Wilderness, Below East Humboldt Highline Trail along Third Boulder Creek, Third Boulder Creek Basin.

Chiricahua Mountains, Coronado National Forest. Short distance up tributary to South Fork Cave Creek called "Log" Canyon

BLM RED ROCK CANYON NATIONAL CONSERVATION AREA. South Fork Pine Creek. Just above forks at mouth of canyon

USDOI Bureau of Land Management, Nevada State Office, Ely District, Pahroc Summit, South Pahroc Range

North of new I-215 in BLM buffer lands.

Jarbidge Wilderness. Along Forest Trail 106 at Sawmill Creek (dry creek bed) toward Jarbidge Lake.

Along forest road 748 north of Bear Creek Meadow toward Jarbidge River

Lake Mead National Recreation Area, N side of Lake Mead, 1.4 mi S of "North Shore Rd" along dirt road to Government Wash; evidence of off-road disturbance present

Lake Mead National Recreation Area, Newberry Mountains, Grapevine Canyon, 2mi N on Christmas Tree Pass Rd from Hwy 77E, beyond petroglyphs to the E

southern Gale Hills, Lovell Wash, 2.2 mi upstream of confluence of Borax Wash and West End Wash

Lake Mead National Recreation Area, N side of Lake Mead, 0.6 mi E of "Westend Wash North" road that heads to the north, 13.7 mi E along North Shore Road from Lake Mead Drive. Gypsum hills on N side of rd, sandstone bluffs on S side of rd.

Lake Mead National Recreation Area, c. 2.5 mi E of Overton Arm of Lake Mead, west of North Shore Road, 1.1 mi S of Overton Beach cutoff

Lake Mead National Recreation Area, Newberry Mountains, Grapevine Canyon, 2 mi N on Christmas Tree Pass Rd from Hwy 77E, beyond petroglyphs to the E

Echo Wash in Bitter Spring Valley, gypsum formation c. 1.0 mi E of Bitter Spring (BLM lands)