Come join Dr. Alan Titus as he gives a personal introduction of Grand Staircase-Escalante National Monument’s newest dinosaur on Friday, February 7, at the GSENM Kanab Visitor Center starting at 7 p.m. The presentation is free and open to the public.
Down and down it goes, where it stops, no body knows! Tell where this stuff flows!
UPDATE: Location Revealed
Last week’s “Spot the Rock” photo shows natural oil seeps (black) and salt (white) at Rozel Point about ½ mile southeast of the Spiral Jetty on the shore of Great Salt Lake, Box Elder County. Miocene to Pliocene (24 to 1.8 million years old) organic-rich lake sediments probably generated the oil. From these source beds, the oil migrated upward along faults and fractures to a porous basalt layer that comprises a main reservoir. Some of the oil in this basalt reservoir leaks to the surface through faults and fractures, emerging as thick, sticky, tar-like oil.
Rozel Point is one of the oldest (if not the oldest) fields to produce oil in Utah. The seeps have been known since the late 1800s and production attempts began in 1904. The field produced an estimated 10,000 barrels of oil from 30 to 50 wells, but has been inactive since the mid-1980s due to extremely difficult production, very high refining costs, and rising lake levels.
The Pony Express basaltic ash is locally a useful stratigraphic marker in Lake Bonneville sediments in west-central Utah. The ash was erupted from a vent in the Sevier Desert basin soon after Lake Bonneville had transgressed high enough to flood into the basin about 24,000 years ago. The ash is found at or near the base of the Bonneville marl below altitudes of 1400m (4600 ft) in part of the Sevier Desert basin and the southernmost part of the Great Salt Lake basin. The chemical composition of the ash is similar to that of other basalts in the Sevier Desert. Possible source vents are in the Pahvant Butte area or a maar near Smelter Knolls.
This CD contains a 10-page report in PDF format. The latest version of Adobe Reader is required to view the PDF files.
The Brian Head Quadrangle straddles the west edge of the Markagunt Plateau and is roughly centered on Brian Head Peak, at 11,307 feet (3446 m) the highest mountain in southwestern Utah. The peak, encompassing an area of great natural beauty and recreational use, is capped by volcanic rocks that erupted from calderas on the Utah-Nevada border. These volcanic rocks overlie landslide-prone local volcaniclastic strata, which in turn overlie colorful strata of the Claron Formation, centerpiece of Cedar Breaks National Monument in the southwest corner of the map area. The plateau is capped by remnants of the 20-million-year-old Markagunt Megabreccia, Utah’s largest catastrophic gravity slide.
This CD contains geographic information system (GIS) files in ESRI file geodatabase and shapefile formats. Two plates, a geologic map at 1:24,000 scale and an explanation plate, and a 38-page booklet are also included in PDF format. The latest version of Adobe Reader is required to view the PDF files.
The exceedingly rare Graham’s penstemon grows exclusively on the sparsely vegetated outcrops of Green River Formation oil shale deposits and can be found only in the Uinta Basin of Utah and the Piceance Creek Basin in Colorado. Federal protection for this scarce plant could be forthcoming as petroleum development becomes more prevalent in the basin.
A swarm, or cluster, of 24 earthquakes have been recorded Tuesday, the first about 37 miles west-northwest of St. George in Nevada, and the others within about a 10-mile radius of the first, see map inset. The earthquakes have ranged from local magnitude 4.1 at both 8:20 a.m. PST and 6:30 p.m. PST, and various lesser amounts throughout the day with the most recent registering local magnitude 3.2 at 6:38 p.m. PST.
And another great article on Utah quakes and other worldly shakes—
Nevada and Utah Earthquakes; Greece, Mid-Atlantic Tremors: January 2014
The world seemed to wake up this week, seismically speaking.
Historically, the communities of La Verkin, Virgin, Rockville, and Springdale have been affected by a variety of geologic hazards. Recent damaging rock falls, riverine floods, recurrent flash floods and landslides, and problems associated with collapsible soil and expansive soil and rock demonstrate that the communities are vulnerable to geologic hazards, and that public officials require reliable hazard information as they plan for future growth. The Utah Geological Survey has prepared GIS-based information on the kinds and locations of geologic hazards that may affect existing and future development in the State Route 9 Corridor Geologic-Hazard Study Area (SR-9 study area). The SR-9 study area encompasses 97 square miles, and consists of a 2- to 8-mile-wide corridor centered on SR-9, that extends from the eastern part of La Verkin City to the Town of Springdale’s eastern boundary with Zion National Park.
This 13-page report includes nine 1:24,000-scale geologic-hazard maps that cover flooding and debris flows, rock fall, landslides, surface faulting, liquefaction, collapsible soil, expansive soil and rock, gypsiferous soil and rock, soil piping, erosion, and wind-blown sand. Each geologic-hazard map provides information on the data sources and techniques used to create the map, the nature and distribution of the hazard, and possible hazard-reduction measures.