bluuebunny/crossref_metadata_2025_split huggingface dataset:
Portuguese Bend landslide complex, southern California
Authors: Ehlig Perry L. 
Published: November 2007

Abstract
The Portuguese Bend landslide complex occupies a 2.5 mi2 (6 km2) amphitheater-shaped topographic embayment on the south flank of the palos verdes peninsula,22 mi(35km) south of the los angeles civic center in southern california.One-third of the complex consists of the active portuguese bend and flying Triangle landslides and the recently active Abalone Cove and Klondike Canyon landslides (Fig.1). The complex is in the northwest corner of the San Pedro, California, 7 1/2-minute Topo-graphic Quadrangle and adjoining partsof the Torrance and Redondo Beach 7 1/2-minute quadrangles.
As part of the greater Los Angeles metropolitanarea, the Portuguese Bend area is easily reached by automobile or by rapid transit District (RTD)buses. The most direct route from the los angeles civic center is south on the Harbor Freeway (1–110) to its terminous at gaffey street in san pendro.Continue south on Gaffey Street for 1.7 mi (2.8 km), turn right on 25th Street and go 2.8 mi (4.5 km) west to where 25th Street merges with Pales Verdes Drive South (PVDS). The east edge of the Portuguese Bend landslide is 1.5 mi (2.4 km) farther west on PVDS. The area can also be approached from the north by way of Crenshaw and Hawthorne Boulevards (Fig.1).An excellent overview of thearea is obtained from the ridge crest on the south side of Del Cerro Park, located near the southern terminous of Crenshaw Boulevard (Fig.1).
Hiking and riding trails and unpaved roads are present within undeveloped parts of the complex, but most of this area is private land and much of the area is within gated communities where entry requiresspecial permission. The only public land is the beacharea seaward of PVDS and west of Inspiration Point (Fig.1). Public parking along PVDS is restricted to a lot on the south side of PVDS, 0.1 mi (0.2 km) west of Wayfarers Chapel (Fig.1) and costs $3.00 per day.
Geologists wishing current information on the landslides or assistance in gaining access to the area should contact Tom Bandy, Community Services Director, City of Rancho Pales Verdes, 30940 Hawthorne Boulevard, Rancho Pales Verdes, CA 90274; telephone (213) 377–0360. Mr. Bandy is also the Executive Director of the Abalone Cove Landslide Abatement District and the Klondike Canyon Geologic Hazard Abatement District.
Banning fault, Cottonwood Canyon, San Gorgonio Pass, southern California
Authors: Morton D. M. , Matti J. C. , Tinsley J. C. 
Published: November 2007

Abstract
The Banning fault site is located at the mouth of Cottonwood Canyon, at the eastern end of San Gorgonio Pass. San Gorgonio Pass is the low divide separating the high steep terrain of the Peninsular Ranges Province to the south, from the higher but less steep Transverse Ranges Province to the north. The San Gorgonio Pass area is reached by taking 1–10 east from the Los Angeles-San Bernardino-Riverside region toward Indio.
Most places with spectacular exposures of the Banning fault are, unfortunately, on property with restricted access, but one location is readily accessible to the public in Cottonwood Canyon near the eastern end of the Banning fault. Cottonwood Canyon is reached by taking the Verbenia exit from 1–10 about 45 mi (72 km) east of Riverside and San Bernardino. Cross north over 1–10 and turn left on the first road, Tamarack. Proceed west 0.3 mi (0.5 km) on Tamarack to Cottonwood Canyon Road. Go north 1.8 mi (2.9 km) on Cottonwood Canyon Road to a sharp right turn. Park in a parking area to the north of the turn, which is at the mouth of Cottonwood Canyon. Part of Cottonwood Canyon Road is paved; the remainder is an improved dirt road easily passable by passenger cars and buses.
Cucamonga fault zone scarps, Day Canyon alluvial fan, eastern San Gabriel Mountains, southern California
Authors: Morton D.M. , Matti J.C. , Tinsley. L.C. 
Published: November 2007

Abstract
the cukamonga fault zone divides the high eastern SanMenlo Park, California 94025 site is located on the day Canyon alluvialfan where stands of the Cucamonga fault zone have produced impressive scarps crossing the fan surface (Fig. 1). This site is readily accessible by taking the base line.Roadexit from 1–10mi(16)km)east of the city of Ontario. Drive 0.25 mi (0.4 km) west onBaseline Road to Etiwanda Avenue; turn north and go 3 mi(5 km) to the end ofEtiwanda Avenue. At the end of EtiwandaAvenue, an east-west oriented dirt power-line service road is parelled and just south of the southernfault south of the Cuca-monga fault zone, Proceeding 0.5 mi (0.8 km) west from Eti wands even of the power-lineserviceroad, adort road leansnorth up the Day Canyon alluvial fan crossing the southern scarpof the Cucamonga fault zone. This road ends at a locked gate about 0.5m (0.8km) from the power line road, this point issituated on top of one of the northern scarps of the Cucamongafault zone. The U.S. Forest Service buildings, referred to as theDay Canyon Station, are located south of the locked gate at thetop of a 130 ft (40 m) high scarp. The dirt roads can be rough, but are generally easily passable for passenger cars.
Supergene enriched fluidized breccia ore, Lavender open pit copper mine, Warren (Bisbee) Mining District, Cochise County, Arizona
Authors: Bryant Donald G. 
Published: November 2007

Abstract
The Lavender open pit is approximately 80 mi (130 km) southeast of Tucson, Arizona, and can easily be reached by car from either Tombstone or Douglas on paved roads (Fig. 1). The overlook or observation site for the Lavender open pit copper mine is on U.S. 80 between Bisbee and Lowell. The topography and a few of the more famous landmarks—such as the Copper Queen mine, which was the first discovery, the Irish Mag mine, and Sacramento Hill (Ransome, 1904)—are shown on Figure 2.
Unlike many of the porphyry copper deposits of the Lavender open pit mineralization is in a fluidized [intrusive] breccia pipe, not porphyry, and is Nevadan (130 Ma), Laramide, in age. The fluidized breccia is composed of exotic ments and boulders that have been transported from below in fine-grained or rock flour matrix of pulverized rock and ported sulfides. The transporting media was a circulating water slurry flowing along preexisting fractures. The ore actually mined in the Lavender pit were not in the porphyry rocks but were transported fragmental sulfides in the matrix mineralized fragments and boulders with later supergene chalcocite enrichment. The mineralization in the porphyrins limited to pyrite with a thin coat of chalcocite, and was very grade.
Roadcut exposure of the San Andreas fault zone along the Antelope Valley Freeway near Palmdale, California
Authors: Barrows Allan G. 
Published: November 2007

Abstract
The spectacular, trench-like roadcut where the Antelope Valley Freeway (California 14) crosses the San Andreas fault zone not only excellently exposes the geology within the zone but is also the most readily accessible point on the San Andreas fault for residents of the Los Angeles region. The locality is 60 mi (100 km) from the Los Angeles Civic Center via I-5 ad California 14, and is about 1 mi (1.6 km) southwest of the city of Palmdale between the offramps for Palmdale Boulevard and Avenue S (Fig. 1).
The Antelope Valley Freeway is a limited-access, divided highway; stopping along the shoulder to view the geology is not permitted. Slowing down while traveling through the cut is also very dangerous because of high-speed freeway traffic. The best way to view the roadcut is to exit the freeway at Avenue S and climb the hill outside the fence along the freeway.
Potrero Canyon fault, landslides and oil drilling site, Pacific Palisades, Los Angeles, California
Authors: McGill J. T. , Lamar D. L. , Hill R. L. , Michael E. D. 
Published: November 2007

Abstract
This stop is located in the Pacific Palisades areaof the City of Los Angeles, directly west of the Sunspot Restaurant and Motel, 15145 Pacific Coast Highway, between traffic signals at Chautauqua Boulevard, 0.5 mi, (0.8 km) to the southeast, and Temescal Canyon Road, 0.6 mi (1.0 km) to the northwest (Fig. 1). The mouth of Potrero Canyon is situated behind the motel. The site can be reached from central Los Angeles to the east via the Santa Monica Freeway (I-10), which continues west of the McClure Tunnel in the City of SantaMonica as the Pacific Coast Highway (California 1), or from the Ventura-Oxnard area to the west via the Pacific Coast ing is Highway through Malibu. Parking is available directly west of the restaurant-motel, or, for afee, directly across the highway; during periods of beach use on summer weekends, parking may be difficultand heavy traffic may be a problem. Extreme care should be taken if it is necessary to cross Pacific Coast Highway.
Turbidite features in the Pico Formation (Pliocene) at Santa Paula Creek, California
Authors: Baldwin E. J. 
Published: November 2007

Abstract
Exposures of turbidite features in the Pico Formation arelocated in Santa Paula Creek along the east side of CaliforniaState Highway 150, 3.1 mi (5 km) north of Main Street, SantaPaula (Fig. 1). Santa Paula is 14 mi (22.4 km) east of the city ofVentura, Ventura County, southern California.
At the roadside entrance to the site, there is a chain and a not respassing sign. Permission to enter may be obtained from the Santa Paula Water Department (805-525-5591). The best exposures of the strata start at a silted dam and gauging station andcontinue south for about 600 ft (180 m). Santa Paula Creek crosses the steeply dipping strata at a right angle, thus providing an excellent cross section for study (Fig. 2).
Sedimentology of Cretaceus strata in Wheeler Gorge, Ventura County, California
Authors: Dibblee T.W. 
Published: November 2007

Abstract
Wheeler Gorge is the narrow part of the North Fork of Matilija Canyon that cuts through the Santa Ynez-Topatopa Range of the western Transverse Ranges, in Ventura County. This canyon is within the Los Padres National Forest.Wheeler Gorge is accessible from California 33 which passes through it and Wheeler Springs, a small resort in this canyon 1 mi (1.6 km) west of Wheeler Gorge. Wheeler Springs is about 19 mi (30 km) north of Ventura on the coast and about 7 mi(11 km) northwest of Ojai in Ojai Valley (Fig.1). At Wheeler Gorge the canyon is so narrow and steep-walled that three short tunnels had to be cut and three bridges built for California 33.The North Fork of Matilija Creek and Wheeler Springs are shown on the Wheeler Springs 7 1/2-minute Topographic Quadrangle of the U.S. Geological Survey.
Jadeitized Franciscan metamorphic rocks of the Pacheco Pass-San Luis Reservoir area, central California Coast Ranges
Authors: Ernst W. G. 
Published: November 2007

Abstract
The Pacheco Pass-San Luis Reservoir area is located in the central Diablo Range along the crest and eastern flank of the uplift. The site is transected by California State Highway 152, a four-lane, divided roadway near and east of the summit (elevation 1,368 ft; 410 m). The area is situated about 120 mi (200 km) southeast of San Francisco and 285 mi (450 km) northwest of Los Angeles. The location is illustrated in Figure 1. Access is provided by Highway 152, and a portion of the former road; four of the six outcrops referred to in this report are roadcuts. Because of heavy automobile and truck traffic on Highway 152, special care must be exercised when examining the rocks, and vehicles should be parked in turnouts or on the shoulder well off the pavement.
Marin Headlands, California
Authors: Wahrhaftig Clyde , Murchey Benita 
Published: November 2007

Abstract
The Marin Headlands are the hills on the north shore of the Golden Gate opposite San Francisco (Figs. 1,2; see Point Bonita and San Francisco North 7DDD÷-minute Quadrangles). They are entirely within the Golden Gate National Recreation Area(GGNRA), a unit of the National Park System. Collecting of rock specimens is by permit only, obtainable on adequate scientific or educationaljustification from the GGNRA headquarters at Fort Mason, San Francisco 94123 (415-556-0560). Application for permit should be made at least two weeks in advance of the visit.
San Francisco MUNI bus No. 76 runs on Sundays and holidays only, between San Francisco and Fort Cronkhite Visitor Center (FCVC, Fig. 1). For schedule and stops in San Francisco call the MUNI system (415-673-MUNI). The Golden Gate Transit District bus No. 10 makes daily stops at the Alexander Avenue off-ramp (Locality 1, Fig. 1); buses Nos. 20,50, and 80 make daily stops at Spencer Avenue (Locality 2, Fig. 1); and bus No. 10 also stops at Tamalpais Valley Junction, from which a road and trail go to the Tennessee Valley trailhead (Locality 3, Fig. 1). Call 415-332-6600 for the Golden Gate Transit schedule and stops in San Francisco.
Automobile access from San Francisco is via U.S. 101 north across the Golden Gate Bridge and the secondoff-ramp (Alexander Avenue) on the north side of the bridge; turn left at first opportunity (about 100 m), go back underneath the freeway, and keep to right up the hill into the Golden Gate National Recreation Area (GGNRA) and Marin Headlands. Approaching from the north on U.S. 101, take the third Sausalito off-ramp (the only off-ramp between the Waldo Tunnel and the Golden Gate Bridge), turn left immediately at the stop sign, and then turn right immediately up the hill at the sign to the GGNRA. The Tennessee Valley Trailhead(Locality 3, Fig. 1) is accessible from California 1 between U.S. 101 and Tamalpais Valley Junction. All travel away from roads must be made on foot, horseback, or bicycle; motorized vehicles are prohibited off designated roads.
Table Mountain of Calaveras and Tuolumne Counties, California
Authors: Rhodes Dallas D. 
Published: November 2007

Abstract
Table Mountain is located in the western foothills of the central Sierra Nevada Range east of Stockton, California (Figs. 1 and 2). California 108 generally follows the ridge from Knight’sFerry to Sonora. Although Table Mountain is not now the obstacleit was for the early gold seekers, only four paved roads cross it:O’Byrnes Ferry Road through Peoria Pass, Rawhide Road nearJamestown, California 49 north from Sonora, and Parrot’s FerryRoad west from Columbia. From Vallecito northward, California4 provides some views of the upstream and more discontinuousparts of the flow, as does California 108 north to Sonora Pass.Most of the lower part of Table Mountain is privately owned andpermission should be sought from local land holders. The higherareas are in national forests. Poison oak grows in abundancealong the flanks of Table Mountain and caution is advisable.
Multiple deformation in the Bennettville area of the Saddlebag Lake pendant, Central Sierra Nevada, California
Authors: Trent D. D. 
Published: November 2007

Abstract
The Bennettville area of the Saddlebag Lake pendant(Fig. 1) straddles the boundary of the Tuolumne Meadows andMono Craters quadrangles. Bennettville is located in the SE 1/4, NW 1/4, Sec.19, T.lN., R.25E. Park vehicles on California 120 atthe road junction to Saddlebag Lake, 9.6 mi (19 km) west of LeeVining and 2.4 mi (4 km) east of Tioga Pass. Bennettville isreached by walking west through the campground to a welldefined fisherman´s trail that begins at the far western edge of thecampground on the north side of Mine Creek. The trail roughlyparallels Mine Creek to Bennettville, an abandoned gold miningcamp, where two buildings remain in arrested decay.
The ultramafic rocks at Eunice Bluff, Trinity Peridotite, Klamath Mountains, California
Authors: Carter Bruce A. , Quick James E. 
Published: November 2007

Abstract
Eunice Bluff is located in the Klamath Mountains of northern California, approximately 30 mi (48 km) south of the Oregon border and 10 mi (16 km) west of I-5 (Fig.1A). It is easily reached by conventional automobile on paved and graded roads, followed by a short walk through open forest. From Gazelle, take the Gazelle-Callahan road west 15.5 mi (24.8 km) and turn left (south) on the road to Kangaroo Lake. Drive 3.7 mi (5.9 km) and turn left (east) on a U.S. Forest Service road with a large steel gate. Drive 2.5 mi (4 km) to Cabin Meadow Creek, turn right (south) and drive 1 mi (1.6 km) up the creek. At this point the road forks; cross the creek and continue an additional 1.2 mi (1.9 km) upthe east side of the creek to the dead end of the road, avoiding the minor logging roads that turn off to the left. From the dead end, walk up the logging skid-road 0.25 mi (0.4 km) east past a small meadow, and then walk 0.25 mi (0.4 km) southsoutheast up the creek to Cabin Meadow Lakes. Eunice Bluff is the prominent light-colored outcrop above the south end of the upper lake. The beginning of the trip, survey point A, is on the large ledge that is about 400 ft (122 m) south of and 100 vertical ft (30.5 m) above the upper lake. The outcrop is usually accessible from May through November but may be covered with snow at times during the rest of the year.
Paleozoic stratigraphic section in Dry Canyon, Whetstone Mountains, Cochise County, Arizona
Authors: Wrucke Chester T. , Armstrong Augustus K. 
Published: November 2007

Abstract
The Whetstone Mountains are in southeastern Arizona along the boundary between Cochise and Pima Counties, about 42 mi (70 km) southeast of Tucson (Fig. 1), Benson, 15 mi (25 km) to the northeast, and Sierra Vista, about the same distance to the south, are the nearest towns. Most of the Whetstone Mountains, including the Dry Canyon area, are in Coronado National Forest. Dry Canyon, on the lower southeast flank of the mountains, is in the Benson15-minute Quadrangle and the Apache Peak and McGrew Spring 7½-minute Quadrangles. Along the canyon, and particularly on the ridge on its south side, a thick sequence of paleozoic rocks is exposed, which is the focus of this report.
The Dry Canyon area (Fig. 2) is reached via Arizona 90, which trends south toward Fort Huachuca and Sierra Vista from its junction with I-10, about 2.7 mi (4.5 km) west of Benson. At a point 13 mi (21.5 km) south of 1–10, a dirt road, marked by a simple ranch gate, leads westward a few mi (km) across public land into Dry Canyon. This road is best traveled using a four-wheel-drive vehicle, but it was passable with difficulty for passenger cars in 1982.
Shelf and deep-marine deposits of Late Cretaceus age, Cape Sebastian area, southwest Oregon
Authors: Hunter Ralph E. , Clifton H. Edward 
Published: November 2007

Abstract
The outcrops described in this report are in the vicinity of Cape Sebastian, Curry County, Oregon (Fig. 1). The principal outcrop (Point A, Fig. 2) is in the Cape Sebastian Sandstone as restricted by Bourgeois (1980), at the south tip of the Cape Sebastian headland. Visitors can most easily reach the outcrop by a 1.2-mi-long (2 km) foot trail that leads down to the south tip of the headland from the parking area at the south end of the road through Cape Sebastian State Park (Point B, Fig. ). The entrance to the state park is on U.S. 101, 6 mi (10 km) south of Gold Beach, Oregon. The outcrops of the Hunters Cove Formation of Dott (1971) are located along the shore of Hunters Cove and can most easily be reached by walking northward along the beach from the parking area alongside U.S. 101 just south of the cove (Point C, Fig. ).
Depoe Bay, Oregon
Authors: Snavely Parke D. 
Published: November 2007

Abstract
The Depoe Bay field site is located on the central Oregon coast, adjacent to U.S. Highway 101, opposite the fishing village of Depoe Bay, Lincoln County, Oregon (Fig. 1). The pillow lavas of the Depoe Bay Basalt are well exposed in sea cliffs just beyond the low seawall along the west side of the highway. The Sandstone of Whale Cove and breccias of the Cape Foulweather Basalt can be reached by steep trails that lead down to the base of the sea cliffs along the north sideof the outer bay. Here, and elsewhere along the Oregon coast, extreme caution should be exercised not to work too close to sea level, as unexpectedly large waves can sweep a person off the rocks. A one-hour excursion aboard a fishing boat that leaves from the innerbay is highly recommended, as this trip provides an opportunity to view the geology along this scenic coastline.
Record of early High Cascade volcanism at Cove Palisades, Oregon
Authors: Taylor Edward M. , Smith Gary A. 
Published: November 2007

Abstract
This site is a series of scenic viewpoints on the east rim of Crooked River canyon above Cove PalisadesState Park, near the boundary between sections 2 and 11, T.12S., R.12E., U.S. Geological Survey 7.5-minutequadrangle Round Butte Dam, Oregon. From downtown Madras, Oregon, follow signs marked “Cove”or “Cove State Park” on paved highways westward to the park entrance. From Redmond, Oregon, travel north on U.S. 97, turn northwestward at the exit to Culver, then follow signs marked “Cove” on paved highways to the park entrance (Fig. 1). Highways to the overlook and park are open all year. Just east of the park entrance, take the paved road north (“To Viewpoints”)along the east edge of the canyon rim to any of three viewpoint parking areas.
Columbia River Gorge
Authors: Beeson Marvin H. , Tolan Terry L. 
Published: November 2007

Abstract
The Columbia River Gorge is located astride the Cascade Range along a 72 mi (120 km)stretch of the Oregon/Washington border 1). The western half of the gorge is covered by the Camas and Bridal Veil 15-minute quadrangles. Primary access to the gorge is by two major highways which traverse its length-the two-lane State Highway 14 along the Washington side and the four-lane Interstate 84 freeway along the Oregon side. Also along the Oregon side are segments of the old Columbia River Scenic Highway, which when completed in 1917 was the first paved highway to extend the length of the gorge. All sites to be visited on the Oregon side are along the old Columbia River Scenic Highway (Fig).
Geology of the Vantage area, south-central Washington
Authors: Carson Robert J. , Tolan Terry L. , Reidel Stephen P. 
Published: November 2007

Abstract
The Vantage area is located along the Columbia River in the central portion of Washington State at the boundary between Grant and Kittitas counties (Fig.1). The area lies entirely within the eastern portion of the Yakima Fold Belt of the Columbia Plateau. The area is covered by the Beverly, Evergreen Ridge, Ginkgo, and Vantage 7.5-minute quadrangles. The Vantage area can be reached via Interstate 90 from the east or west or State Route 243 from the south (Fig.1). All sites within the Vantage area are along paved roads.
Dry Falls of the Channeled Scabland, Washington
Authors: Baker Victor R. 
Published: November 2007

Abstract
Dry Falls is located on the Coulee City 7%-minute Quadrangle(Fig. 1) at Lat. 47°36'N, Long. 119°21'W; sec.6, T.24N., R28E, in Grant County, Washington. It can be reached by passenger car or bus on Washington 17, 18.5 mi (29.6 km) north of Soap Lake or 1 1/2 mi (2.4 km) south of the junction of U.S. 2 and Washington 17 near Coulee City, Washington. The falls are easily viewed from a public overlook atDry Falls State Park.