Town News Week of October 18, 2010
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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. -
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 -
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 .................................................................................................................. -
Mammoth Pacific I Replacement Project Revised Draft Environmental Impact Report
MAMMOTH PACIFIC I REPLACEMENT PROJECT REVISED DRAFT ENVIRONMENTAL IMPACT REPORT California Clearinghouse Number 2011022020 February 2012 CEQA Lead Agency: Mono County P.O. Box 2415 Mammoth Lakes, California 93546 MAMMOTH PACIFIC I REPLACEMENT PROJECT REVISED DRAFT ENVIRONMENTAL IMPACT REPORT California Clearinghouse Number 2011022020 February 2012 CEQA Lead Agency: Mono County P.O. Box 2415 Mammoth Lakes, California 93546 Project Applicant: Mammoth Pacific, L.P. P.O. Box 1584 Mammoth Lakes, California 93546 CEQA Consultants: CAJA Environmental Services, LLC and Environmental Management Associates, Inc. 588 Explorer Street Brea, California 92821 Mammoth Pacific I Replacement Project Revised Draft EIR TABLE OF CONTENTS TABLE OF CONTENTS ...........................................................................................................................................II LIST OF FIGURES ............................................................................................................................................... VIII LIST OF TABLES .................................................................................................................................................... IX LIST OF APPENDICES ............................................................................................................................................ X ACRONYMS ............................................................................................................................................................. XI SUMMARY ................................................................................................................................................................. -
Inspiring Destinations Mt
Inyo National Forest Visitor Guide $1.00 Suggested Donation Joel Sladky © Inspiring Destinations Mt. Whitney. Welcome to the Inyo National Forest The Inyo National Forest is a Golden Trout, Inyo Mountains, and fishing attract thousands of Contents land of superlatives: the oldest Boundary Peak, South Sierra, visitors during the summer months. trees, the tallest mountains in White Mountain, and Owens River Beginner to expert anglers can try Wildlife 2 California, among the oldest Headwaters wildernesses. their luck fishing at more than 400 inland lake (Mono Lake), desert, lakes and 1,100 miles of streams Wilderness 3 glaciers, and the dramatic Eastern Devils Postpile National that provide habitat for golden, Sierra escarpment. Get ready for a Monument, administered by the brook, brown and rainbow trout. Regional Map - North 4 memorable visit. National Park Service, is located Mono Lake, June Lake 5 within the Inyo National Forest Mountain bike enthusiasts can ride Extending 165 miles along in the Reds Meadow area west the challenging Kamikaze Trail the California/Nevada border Mammoth Lakes, of Mammoth Lakes. In addition, from the top Mammoth Mountain between Los Angeles and the Inyo shares the tallest peak in Rock Creek 6 or one of many other trails that Reno, the Inyo National Forest, the lower 48 states, Mt. Whitney transect the front country of the Mammoth Lakes Map 7 established May 25, 1907, includes (14,494 feet) with Sequoia National over two million acres of pristine forest. Sixty-five trailheads provide Park. Reds Meadow/ lakes, winding streams, rugged access to over 1,200 miles of trail in Devils Postpile 8 Sierra Nevada peaks and arid the 1.2 million acres of wilderness Spring/Summer Great Basin mountains. -
A Preliminary Survey of the Aquatic and Semiaquatic Hemiptera
Polhemus and Polhemus: Aquatic Hemiptera of Desert Hot Springs 1 A preliminary survey of the aquatic and semiaquatic Hemiptera occurring in the springs of the Railroad Valley, White River, and Amargosa River drainage systems, Nevada and California, with special reference to thermal relicts Dan A. Polhemus Dept. of Entomology, Bishop Museum, P. 0. Box 19000-A, Honolulu, HI 96817 ard John T. Polhemus Univ. of Colorado Museum, 3115 S. York St., Englewood, CO 80110 INTRODUCTION One of the most remarkable concentrations of disjunct and endemic aquatic Hemiptera in North America is found in the thermal refugia of the Railroad Valley, White River, and Amargosa River drainages of Nevada and California. These drainages represent former tributaries to the Colorado system that were continuous systems in the Pliocene and Pleistocene, but have been subsequently dessicated and reduced to discontinous spring fed aquatic refugia. The thermal springs of these three systems contain a large number of endemic aquatic Hemiptera species, as well as many highly disjunct populations of other taxa. The current report details the distributions of these species, addresses certain taxonomic problems relating to them, and considers the biogeographic significance of this thermally relictual fauna. LOCALITIES SAMPLED The information upon which this report is based has been collected by the authors over a period of thirty years, and in many cases the passage of several decades has seen a serious degredation of the aquatic habita~s listed below. For this reason an attempt has been made in the last three years to revisit many of the most critical habitats and &scertain the status of their aquatic Hemiptera faunas. -
Late Quaternary Deformation and Seismic Risk Vl in the Northern Sierra Nevada-Great Basin Boundary Zone Near the Sweetwater Mountains, California and Nevada
University of Nevada Reno !Late Quaternary deformation and seismic risk vl in the northern Sierra Nevada-Great Basin Boundary Zone near the Sweetwater Mountains, California and Nevada A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology by Garry Fallis Hayes W\ April 1985 i MINIS 1 LIBRARY University of Nevada Reno April 1985 ii ABSTRACT Remote-sensing, seismic and field studies indi cate three major zones of Quaternary deformation near the Sweetwater Mountains. Holocene fault scarps are present in the Antelope, Little Ante lope, Smith and Bridgeport Valleys, and in the Sonora Basin. Two other vaguely defined zones, between Carson and Antelope valleys, and from the Bridgeport Valley east to Bald Mountain, may repre sent Mio-Pliocene zones of faulting which more recently have acted as conjugate shears releasing stress between fault basins in the Western Great Basin between the Sierra Nevada and Walker Lane shear zone. The northern portion of the Sierra Nevada-Great Basin Boundary Zone is less active than the south ern part in Owens Valley, as shown by lower slip rates, shorter fault lengths and lower levels of historical seismicity. Maximum Credible Earthquake magnitudes for the fault basins range from 6.3 to 7.2, with expected displacements of 3 meters or more. iii ACKNOWLEDGEMENTS The author would like to thank Dr. D.B. Slemmons, Craig DePolo and J.O. Davis for helpful discussions during the course of this study. Special thanks to Craig DePolo, Susan Hciyss and Ron Smith, who assisted with the field studies, and to Glenn Hayes who assisted with the manuscript preparation.