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Geologic Map of the Long Valley Caldera, Mono-Inyo Craters
DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP 1-1933 US. GEOLOGICAL SURVEY GEOLOGIC MAP OF LONG VALLEY CALDERA, MONO-INYO CRATERS VOLCANIC CHAIN, AND VICINITY, EASTERN CALIFORNIA By Roy A. Bailey GEOLOGIC SETTING VOLCANISM Long Valley caldera and the Mono-Inyo Craters Long Valley caldera volcanic chain compose a late Tertiary to Quaternary Volcanism in the Long Valley area (Bailey and others, volcanic complex on the west edge of the Basin and 1976; Bailey, 1982b) began about 3.6 Ma with Range Province at the base of the Sierra Nevada frontal widespread eruption of trachybasaltic-trachyandesitic fault escarpment. The caldera, an east-west-elongate, lavas on a moderately well dissected upland surface oval depression 17 by 32 km, is located just northwest (Huber, 1981).Erosional remnants of these mafic lavas of the northern end of the Owens Valley rift and forms are scattered over a 4,000-km2 area extending from the a reentrant or offset in the Sierran escarpment, Adobe Hills (5-10 km notheast of the map area), commonly referred to as the "Mammoth embayment.'? around the periphery of Long Valley caldera, and The Mono-Inyo Craters volcanic chain forms a north- southwestward into the High Sierra. Although these trending zone of volcanic vents extending 45 km from lavas never formed a continuous cover over this region, the west moat of the caldera to Mono Lake. The their wide distribution suggests an extensive mantle prevolcanic basement in the area is mainly Mesozoic source for these initial mafic eruptions. Between 3.0 granitic rock of the Sierra Nevada batholith and and 2.5 Ma quartz-latite domes and flows erupted near Paleozoic metasedimentary and Mesozoic metavolcanic the north and northwest rims of the present caldera, at rocks of the Mount Morrisen, Gull Lake, and Ritter and near Bald Mountain and on San Joaquin Ridge Range roof pendants (map A). -
California Pika Consortium Mono Basin- Bodie Hills Field Trip Sunday, July 31, 2011 – Monday, August 1, 2011
California Pika Consortium Mono Basin- Bodie Hills Field Trip Sunday, July 31, 2011 – Monday, August 1, 2011 Amended with comments and observations in red font after the Field Trip: 13 August 2011 (cim) Field Trip Objectives: Provide a forum for California Pika Consortium (CPC) participants to observe and discuss topics of current interest at key and relevant field sites. In particular, to observe and contrast pika habitat abundance, quality, and connectivity in the Sierra Nevada and Bodie Hills; to visit low-elevation and high-elevation sites typical of the central-eastern Sierra Nevada; to observe and compare anthropogenic habitat (ore dumps) and native talus sites in the Bodie Hills; to discuss the relevance of these observations to climate relationships, talus thermal regimes, dispersal and connectivity (source/sink), population dynamics, and population processes in California and elsewhere in American pika’s range. Agenda Sunday, July 31 (see accompanying Road Log and Maps for specifics) 8:00 am Convene at USFS Mono Basin Scenic Area Visitor Center, consolidate vehicles (don’t forget lunch, snacks, water) 8:15 am Depart Visitor Center for Stops 1-7 Stop 1: Lundy Cyn (short walk) Stop 2: Virginia Lks Cyn Trailhead (short walk) Stop 3: Conway Highlands Overview instead we made a brief stop to “Benjamin Buttes” Stop 4: Bodie Pass – LUNCH (bring your own) Stop 5: Syndicate Mine, Bodie (short walk) Stop 6: Chemung Mine weather did not allow us to visit this site Stop 7: Serrita Mine, New York Hill, Masonic District (short walk) weather did not allow us to visit this site Note: If time gets short, we might forego one or more of the final stops ~ 7pm? Dinner (no host) at Tioga Gas Mart, Tioga Toomey’s Café, 0.25 miles west on SR 120 of junction with US 395. -
Inyo National Forest Visitor Guide
>>> >>> Inyo National Forest >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> Visitor Guide >>> >>> >>> >>> >>> $1.00 Suggested Donation FRED RICHTER Inspiring Destinations © Inyo National Forest Facts “Inyo” is a Paiute xtending 165 miles Bound ary Peak, South Si er ra, lakes and 1,100 miles of streams Indian word meaning along the California/ White Mountain, and Owens River that provide habitat for golden, ENevada border between Headwaters wildernesses. Devils brook, brown and rainbow trout. “Dwelling Place of Los Angeles and Reno, the Inyo Postpile Nation al Mon ument, Mam moth Mountain Ski Area National Forest, established May ad min is tered by the National Park becomes a sum mer destination for the Great Spirit.” 25, 1907, in cludes over two million Ser vice, is also located within the mountain bike en thu si asts as they acres of pris tine lakes, fragile Inyo Na tion al For est in the Reds ride the chal leng ing Ka mi ka ze Contents Trail from the top of the 11,053-foot mead ows, wind ing streams, rugged Mead ow area west of Mam moth Wildlife 2 Sierra Ne va da peaks and arid Great Lakes. In addition, the Inyo is home high Mam moth Moun tain or one of Basin moun tains. El e va tions range to the tallest peak in the low er 48 the many other trails that transect Wildflowers 3 from 3,900 to 14,494 feet, pro vid states, Mt. Whitney (14,494 feet) the front coun try of the forest. Wilderness 4-5 ing diverse habitats that sup port and is adjacent to the lowest point Sixty-five trailheads provide Regional Map - North 6 vegetation patterns ranging from in North America at Badwater in ac cess to over 1,200 miles of trail Mono Lake 7 semiarid deserts to high al pine Death Val ley Nation al Park (282 in the 1.2 million acres of wil der- meadows. -
Compositional Zoning of the Bishop Tuff
JOURNAL OF PETROLOGY VOLUME 48 NUMBER 5 PAGES 951^999 2007 doi:10.1093/petrology/egm007 Compositional Zoning of the Bishop Tuff WES HILDRETH1* AND COLIN J. N. WILSON2 1US GEOLOGICAL SURVEY, MS-910, MENLO PARK, CA 94025, USA 2SCHOOL OF GEOGRAPHY, GEOLOGY AND ENVIRONMENTAL SCIENCE, UNIVERSITY OF AUCKLAND, PB 92019 AUCKLAND MAIL CENTRE, AUCKLAND 1142, NEW ZEALAND Downloaded from https://academic.oup.com/petrology/article/48/5/951/1472295 by guest on 29 September 2021 RECEIVED JANUARY 7, 2006; ACCEPTED FEBRUARY 13, 2007 ADVANCE ACCESS PUBLICATION MARCH 29, 2007 Compositional data for 4400 pumice clasts, organized according to and the roofward decline in liquidus temperature of the zoned melt, eruptive sequence, crystal content, and texture, provide new perspec- prevented significant crystallization against the roof, consistent with tives on eruption and pre-eruptive evolution of the4600 km3 of zoned dominance of crystal-poor magma early in the eruption and lack of rhyolitic magma ejected as the BishopTuff during formation of Long any roof-rind fragments among the Bishop ejecta, before or after onset Valley caldera. Proportions and compositions of different pumice of caldera collapse. A model of secular incremental zoning is types are given for each ignimbrite package and for the intercalated advanced wherein numerous batches of crystal-poor melt were plinian pumice-fall layers that erupted synchronously. Although released from a mush zone (many kilometers thick) that floored the withdrawal of the zoned magma was less systematic than previously accumulating rhyolitic melt-rich body. Each batch rose to its own realized, the overall sequence displays trends toward greater propor- appropriate level in the melt-buoyancy gradient, which was self- tions of less evolved pumice, more crystals (0Á5^24 wt %), and sustaining against wholesale convective re-homogenization, while higher FeTi-oxide temperatures (714^8188C). -
Bailey-1976.Pdf
VOL. 81, NO. 5 JOURNAL OF GEOPHYSICAL RESEARCH FEBRUARY 10, 1976 Volcanism, Structure,and Geochronologyof Long Valley Caldera, Mono County, California RoY A. BAILEY U.S. GeologicalSurvey, Reston, Virginia 22092 G. BRENT DALRYMPLE AND MARVIN A. LANPHERE U.S. GeologicalSurvey, Menlo Park, California 94025 Long Valley caldera, a 17- by 32-km elliptical depressionon the east front of the Sierra Nevada, formed 0.7 m.y. ago during eruption of the Bishoptuff. Subsequentintracaldera volcanism included eruption of (1) aphyric rhyolite 0.68-0.64 m.y. ago during resurgentdoming of the caldera floor, (2) porphyritic hornblende-biotiterhyolite from centersperipheral to the resurgentdome at 0.5, 0.3, and 0.1 m.y. ago, and (3) porphyritic hornblende-biotiterhyodacite from outer ring fractures0.2 m.y. ago to 50,000 yr ago, a sequencethat apparently records progressivecrystallization of a subjacentchemically zoned magma chamber. Holocene rhyolitic and phreatic eruptions suggestthat residual magma was present in the chamber as recentlyas 450 yr ago. Intracaldera hydrothermalactivity beganat least0.3 m.y. ago and was widespreadin the caldera moat; it has sincedeclined due to self-sealingof near-surfacecaldera sediments by zeolitization, argillization, and silicificationand has becomelocalized on recentlyreactivated north- west-trendingSierra Nevada frontal faults that tap hot water at depth. INTRODUCTION concentrates were treated with a dilute HF solution to remove small bits of attached glassand fragments of other mineral In the westernUnited States,only three calderasare known grains. Obsidian used for dating was totally unhydrated and to be large enoughand young enoughto possiblystill contain not devitrified. Small blocks sawed from many of the hand residual magma in their chambers:the Vailes caldera (•1.1 specimenswere used for dating. -
"Ground Water in White River Valley, White Pine, Nye, and Lincoln
STATE OF NEVADA OFFICE OF THE STATE ENGINEER WATER RESOURCES BULLETIN No. 8 GROUND WATER IN WHITE RIVER VALLEY, WHITE PINE, NYE, AND LINCOLN COUNTIES, NEVADA By G. B. MAXEY and T. E. EAKIN Prepared in cooperation with the UNITED STATES DEPARTMENT OF THE INTERIOR Geological Survey 1 949 CARSON CITY. NEVADA STATE PRINTING OFFICE JACK MCCARTHY. SUPERINTENDENT 1930 CONTENTS PAGE Foreword ............................................... 5 Abstract ............................................... 7 Introduction .............................................. 9 Location and general features .............................. 12 Drainage ................................................ 14 Climate ................................................ 18 Precipitation ................................................ 18 Temperature ................................................ 19 Vegetation ............................................... 25 Geology and water-bearing characteristics of the rocks . 26 General relations . .............. 26 Older sedimentary and igneous rocks . ............................................. 26 MCCARTHY. SUPERINTENDENT Tertiary and Quaternary alluvial and lacustrine deposits ..... 29 Ground water ................................................ 33 Occurrence ............................................... 33 Springs ............................................... 35 Source and amount of recharge . ............. 40 Movement ............................................... 41 Discharge ............................................... -
Chapter 06 Fisheries & Aquatic Resources.Pdf
CHAPTER 6 Fisheries and Aquatic Resources CHAPTER 6 FISHERIES AND AQUATIC RESOURCES This chapter describes the existing fisheries and aquatic resources conditions, the applicable regulations, and potential impacts from implementation of the Proposed Project Alternative and other alternatives on the fisheries and aquatic resources in the Project Area. 6.1 ENVIRONMENTAL SETTING This section describes the environmental setting related to fisheries and aquatic resources that may be influenced by implementation of the Proposed Project Alternative or other alternatives in the Project Area including Lake Mary, Mammoth Creek extending from Lake Mary to its confluence with Hot Creek, and Hot Creek from its confluence with Mammoth Creek downstream to the USGS Hot Creek Flume Gage. 6.1.1 LAKE MARY Lake Mary is a cirque lake (a deep, steep-walled basin on a mountain) formed by the filling of remnant moraine depressions left by receding glaciers (USGS 1999). Lake Mary contains prominent granite features, and cold, clear water, making it a popular angling destination. A "fishing enhancement" program is implemented by both the Town of Mammoth Lakes and CDFG to maintain the lake’s appeal as a “trophy” trout destination. The recreational fishery in Lake Mary is maintained by both the Town of Mammoth Lakes and CDFG because of its economic importance to the Mammoth Lakes Basin (Mammoth City Concierge 2010). Lake Mary has been, and continues to be managed as a put-and-take recreational fishery. Hatchery rainbow trout have been regularly planted by CDFG beginning in the late spring and extending through the summer. The lake also is often planted with “Alpers trout.” The Alpers trout is a genetic hybrid of rainbow trout, Kamloops trout and steelhead, raised in the streams and ponds of Alpers Owens River Ranch. -
1999 ANNUAL MONITORING REPORT Bruneau Hot-Spring
1999 ANNUAL MONITORING REPORT Bruneau Hot-spring Springsnail (Pyrgulopsis bruneauensis) by Cary D. Myler and G. Wayne Minshall Stream Ecology Center Department of Biological Sciences Idaho State University Pocatello, Idaho 83209 Prepared for U.S. Bureau of Land Management Lower Snake River District Boise, ID 83709 January 2000 T ABLE OF CONTENTS List of Figures .................................................................................................................... ii List of Tables ..................................................................................................................... iii List of Appendices ............................................................................................................ iii Summary ............................................................................................................................ 1 Introduction ........................................................................................................................ 2 Methods .............................................................................................................................. 3 Site Description ............................................................................................................ 3 Springsnail Size Distribution ......................................................................................... 5 Springsnail Population Fluctuations ............................................................................. 5 Discharge, Temperature, and Water -
Most Recent Eruption of the Mono Craters, Eastern Central California
JOURNALOF GEOPHYSICALRESEARCH, VOL. 91, NO. B12, PAGES12,539-12,571, NOVEMBER10, 1986 MOST RECENT ERUPTION OF THE MONO CRATERS, EASTERN CENTRAL CALIFORNIA Kerry Sieh and Marcus Bursik Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena Abstract. The most recent eruption at the gradually diminishing explosiveness of the North Mono Craters occurred in the fourteenth century Mono eruption probably resulted from a decrease A.D. Evidence for this event includes 0.2 km3 of of water content downward in the dike. The pyroclastic fall, flow, and surge deposits and pulsating nature of the early, explosive phase of 0.4 km3 of lava domesand flows. These rhyolitic the eruption may represent the repeated rapid deposits emanated from aligned vents at the drawdown of slowly rising vesiculated magma to northern end of the volcanic chain. Hence we about the saturation depth of the water within have named this volcanic episode the North Mono it. eruption. Initial explosions were Plinian to sub-Plinian events whose products form Introduction overlapping blankets of air fall tephra. Pyroclastic flow and surge deposits lie upon Several dozen silicic eruptions have occurred these undisturbed fall beds within several along the tectonically active eastern flank of kilometers of the source vents. Extrusion of the central Sierra Nevada within the past 35,000 five domes and coulees, including Northern Coulee years; many of these eruptions have, in fact, and Panurn Dome, completed the North Mono occurred within the past 2000 years. This eruption. Radiocarbon dates and violent, exciting, and youthful past suggests an dendrochronological considerations constrain the interesting future and encouraged us to undertake eruption to a period between A.D. -
Regional Transportation Plan
MONO COUNTY REGIONAL TRANSPORTATION PLAN Mono County Local Transportation Commission Mono County Community Development Department Town of Mammoth Lakes Community Development Department MONO COUNTY LOCAL TRANSPORTATION COMMISSION COMMISSIONERS Fred Stump, Chair (Mono County) Shields Richardson, Vice-Chair (Mammoth Lakes) Jo Bacon (Mammoth Lakes) Tim Fesko (Mono County) Larry Johnston (Mono County) Sandy Hogan (Mammoth Lakes) STAFF Mono County Scott Burns, LTC Director Gerry Le Francois, Principal Planner Wendy Sugimura, Associate Analyst Jeff Walters, Public Works Director Garrett Higerd, Associate Engineer Courtney Weiche, Associate Planner C.D. Ritter, LTC Secretary Megan Mahaffey, Fiscal Analyst Town of Mammoth Lakes Haislip Hayes, Associate Civil Engineer Jamie Robertson, Assistant Engineer Caltrans District 9 Brent Green, District 9 Director Ryan Dermody, Deputy District 9 Director Planning, Modal Programs, and Local Assistance Denee Alcala, Transportation Planning Branch Supervisor Eastern Sierra Transit Authority (ESTA) John Helm, Executive Director Jill Batchelder, Program Coordinator TABLE OF CONTENTS EXECUTIVE SUMMARY .......................................................................................................................... 1 Transportation Directives .......................................................................................................................... 1 Summary of Needs and Issues .................................................................................................................. -
Development of a Groundwater Flow Model for the Bishop/Laws Area
DEVELOPMENT OF A GROUNDWATER FLOW MODEL FOR THE BISHOP/LAWS AREA FINAL REPORT FOR LOCAL GROUNDWATER ASSISTANCE GRANT AGREEMENT NO. 4600004129 Robert Harrington, PhD, R.G. INYO COUNTY WATER DEPARTMENT APRIL, 2007 TABLE OF CONTENTS EXECUTIVE SUMMARY ………………………………………. 3 INTRODUCTION ………………………………………………. 5 CONCEPTUAL MODEL ………………………………………… 8 SIMULATION MODEL …………………………………………. 5 PREDICTIVE SIMULATIONS …………………………………. 23 SUMMARY AND CONCLUSIONS ……………………………. 26 REFERENCES …………………………………………………… 28 APPENDIX 1 ……………………………………………………. 51 APPENDIX 2 ……………………………………………………. 54 LIST OF FIGURES Figure 1. Study area location……………………………………………… 30 Figure 2. Geology…………………………………………………………. 31 Figure 3. Hydraulic conductivity distribution…………………………….. 32 Figure 4. Aquifer test locations…………………………………………… 33 Figure 5. Well locations…………………………………………………... 34 Figure 6. Layer 1 hydraulic conductivity zones…………………………... 35 Figure 7. Layer 2 hydraulic conductivity zones………………………….. 36 Figure 8. Layer 3 hydraulic conductivity zones…………………………. 37 Figure 9. Layer 4 hydraulic conductivity zones…………………………. 38 Figure 10. Layer 5 hydraulic conductivity zones………………………… 39 Figure 11. Quaternary faults and horizontal flow barriers………………. 40 Figure 12. Recharge zones……………………………………………….. 41 Figure 13. Evapotranspiration zones……………………………………… 42 Figure 14. Boundary conditions………………………………………….. 43 Figure 15. Observed vs. residuals………………………………………… 44 Figure 16. Distribution of residuals………………………………………. 45 Figure 17. Spatial distribution of residuals………………………………. 46 Figure 18. Drawdown -
Geologists Reveal Secrets Behind Supervolcano Eruption 5 March 2007
Geologists Reveal Secrets Behind Supervolcano Eruption 5 March 2007 author of the paper. The 20-mile-long Long Valley Caldera was created when the supervolcano erupted. The geologists focused their efforts on Bishop Tuff, an expanse of rock that was built up as the hot ash cooled following the eruption. The researchers studied the distribution of titanium in quartz crystals in samples taken from Bishop Tuff. A team from Rensselaer previously discovered that trace levels of titanium can be analyzed to determine the temperature at which the quartz crystallized. By monitoring titanium, Wark and his colleagues confirmed that the outer rims of the A piece of supervolcano and extracted quartz crystals quartz had formed at a much hotter temperature analyzed for titanium. Credit: Rensselaer Polytechnic than the crystal interiors. The researchers Institute/David Wark concluded that after the interiors of the quartz crystals had grown, the magma system was “recharged” with an injection of fresh, hot melt. This caused the quartz to partly dissolve, before Researchers at Rensselaer Polytechnic Institute starting to crystallize again at a much higher have discovered what likely triggered the eruption temperature. of a “supervolcano” that coated much of the western half of the United States with ash fallout Analyses of titanium also revealed that the high- 760,000 years ago. temperature rim-growth must have taken place within only 100 years of the massive volcano’s Using a new technique developed at Rensselaer, eruption. This suggests that the magma recharge the team determined that there was a massive so affected the physical properties of the magma injection of hot magma underneath the surface of chamber that it caused the supervolcano to erupt what is now the Long Valley Caldera in California and blanket thousands of square miles with searing some time within 100 years of the gigantic ash.