Ajo Area Maps Are Provided As a Public Service by the Cafe N

Total Page:16

File Type:pdf, Size:1020Kb

Ajo Area Maps Are Provided As a Public Service by the Cafe N AA BB CC DD EE FF Ajo Country Club A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 10 M 1 1 Ajo Landfill 2 2 19 M 3 3 Ajo Peak 4 U. S. A I R F O R C E Highway 85 4 B A R R Y M 28 E 5 5 G O L D W A T E R 10 Mile Wash B A T A M O T E M O U N T A I N S Black Mountain 6 6 R A N G E Railroad 30 N 7 7 Ajo Sewage Pond 8 Mead Rd Virgil Ellis 8 Rifle 20 M Range 9 Well 9 Ajo Picnic Cardigan Peak 10 Childs Mtn Rd Country 10 Club Grounds 23 E (Restricted Access) 10 Mile Wash 11 Eric Marcus 11 Park Childs Mtn Road Municipal Equestrian Picnic 12 Airport Grounds 12 10 J through 11 A 13 13 C A B E Z A P R I E T A N A T I O N A L W I L D F E R U G T I O N A L T A N C A B E Z P R I Cole Rd B U R E A U O F Cole Road 14 14 13N through 10 N Radio L A N D 15 Tower 15 M A N A G E M E N T Darby Wells Road 16 HwyAjo-Gila 85, Bend Hwy 16 28 L through 25 P 17 Well Road 17 Burro Gap Equestrian Park 18 Railroad 18 11 O Ajo 19 Ols- Land- 19 en’s Eric Marcus Rasmussen Rasmussen Rd Sew- fill Cabeza age 20 Prieta Ofc Pond 20 Municipal Airport Walker Pipeline Road Childs St Park Tailings J-L 9-11 Cem- Sheriff 21 etary 21 To Burro Gap, Coffee Pot Mountain Rocalla Sikort Chuapo Wash Golden Hasan 22 Minerals Research 22 Water School (4 Wheel Drive Recommended) Tanks Casino TV 23 Tower Water 23 Cardigan Tanks Highway 85 43 CC A Saguaro Peak Mountain 24 (AKA Camelback N 24 Mountain) Gunsight The Pit Rock Dump 25 Copper Canyon 25 48 FF Scenic LoopPinnacle 26 North Peak W E 26 Ajo Peak Locomotive Rock 27 27 30 I Scenic Loop Road S 28 Ajo Peak © 2006 Ajo Copper News 28 Darby Wells Rd Mead Road 29 29 8J through 13 N Locomotive 30 Black Mtn 30 Rock North Ajo Peak Valentine 31 Well 31 26 D 32 B U R E A U O F 32 Highway 85 Picnic Grounds 33 L A N D 33 10-12 P-Q Bates Well Road Well Bates 34 M A N A G E M E N T 34 Pipeline Road 35 35 24 N through 19 FF 36 A B C D E F G H I J K L M N O P Q 36 Pit 24-26 I-L Palo Verde BorderLn Patrol Station 37 37 Landfill E. Ocotillo St ©2006 Twiggy Thompson 38 38 Scenic Loop Road 3 H through 25 P E. Saguaro St Arizona 39 Why 39 Copper Hills 40 40 H Ten Mile Wash N. Mesquite Ln N. Realty E. Cholla St Ebberling Tank Route w 1 H through 19 FF y N. Ironwood Dr Ironwood N. 387-8787 41 41 8 41 W. Plaza St. 6 42 T 42 Valentine Well o Golden Why, Ajo, AZ 85321 Hasan S 31 G Coyote 43 Casino 43 www.azcopperhills.com e l Howls Lewis l s T I O N T O H N ‘ D A M Ariz. West W. Kater Rd Used with permission 44 Well & 44 Virgil Ellis Rifle Range T u 8 Q Laun- 45 c 45 dromat so n 46 46 Well Why W H Y 9 O Baptist M T N Church 47 47 Gun- W. Guinn E. Guinn Rd Water 48 48 Well Road Tanks sight Sonoyta and Rocky Point, Mexico Highway 85 To Organ Pipe, Lukeville, 22 K through 9 O XY 49 49 Bar & Cafe 50 50 Why, Arizona O R G A N P I P E C A C T U S 39-40 AA-BB S. Mesquite Ln S. N A T I O N A L M O N U M E N T W. Hammons E. Hammons Rd 51 51 R S T U V W X Y Z AA BB CC DD EE FF W. Higgins Rd Mile Post 53 Ajo & Ajo area maps are provided as a public service by the Cafe N. Ajo-Tucson Hwy, Hwy 86 E. Longacre Rd Flores Why Not Chevron Travel Store Fire W. Denning Rd Dept. Community Coyote Center Howls Ajo’s hometown newspaper since 1916 W. Ball Rd E. Ball Road E. Ball Road East Phone 520-387-7688 • Fax 520-387-7505 P. O. Box 39 Ajo, Arizona 85321 www.cunews.info S. Sonoita Hwy, Hwy 85 Why map provided by Twiggy Thompson of Az Copper Hills Realty S. Mary K. Bairs Rd Mary K. S. 520-387-8787 41 W. Plaza St. Ajo, AZ 85321 www.azcopperhills.com.
Recommended publications
  • Ajo Peak to Tinajas Altas: a Flora of Southwestern Arizona
    Felger, R.S., S. Rutman, and J. Malusa. 2014. Ajo Peak to Tinajas Altas: A flora of southwestern Arizona. Part 6. Poaceae – grass family. Phytoneuron 2014-35: 1–139. Published 17 March 2014. ISSN 2153 733X AJO PEAK TO TINAJAS ALTAS: A FLORA OF SOUTHWESTERN ARIZONA Part 6. POACEAE – GRASS FAMILY RICHARD STEPHEN FELGER Herbarium, University of Arizona Tucson, Arizona 85721 & Sky Island Alliance P.O. Box 41165, Tucson, Arizona 85717 *Author for correspondence: [email protected] SUSAN RUTMAN 90 West 10th Street Ajo, Arizona 85321 JIM MALUSA School of Natural Resources and the Environment University of Arizona Tucson, Arizona 85721 [email protected] ABSTRACT A floristic account is provided for the grass family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in southwestern Arizona. This is the second largest family in the flora area after Asteraceae. A total of 97 taxa in 46 genera of grasses are included in this publication, which includes ones established and reproducing in the modern flora (86 taxa in 43 genera), some occurring at the margins of the flora area or no long known from the area, and ice age fossils. At least 28 taxa are known by fossils recovered from packrat middens, five of which have not been found in the modern flora: little barley ( Hordeum pusillum ), cliff muhly ( Muhlenbergia polycaulis ), Paspalum sp., mutton bluegrass ( Poa fendleriana ), and bulb panic grass ( Zuloagaea bulbosa ). Non-native grasses are represented by 27 species, or 28% of the modern grass flora.
    [Show full text]
  • Anza-Borrego Desert State Park Bibliography Compiled and Edited by Jim Dice
    Steele/Burnand Anza-Borrego Desert Research Center University of California, Irvine UCI – NATURE and UC Natural Reserve System California State Parks – Colorado Desert District Anza-Borrego Desert State Park & Anza-Borrego Foundation Anza-Borrego Desert State Park Bibliography Compiled and Edited by Jim Dice (revised 1/31/2019) A gaggle of geneticists in Borrego Palm Canyon – 1975. (L-R, Dr. Theodosius Dobzhansky, Dr. Steve Bryant, Dr. Richard Lewontin, Dr. Steve Jones, Dr. TimEDITOR’S Prout. Photo NOTE by Dr. John Moore, courtesy of Steve Jones) Editor’s Note The publications cited in this volume specifically mention and/or discuss Anza-Borrego Desert State Park, locations and/or features known to occur within the present-day boundaries of Anza-Borrego Desert State Park, biological, geological, paleontological or anthropological specimens collected from localities within the present-day boundaries of Anza-Borrego Desert State Park, or events that have occurred within those same boundaries. This compendium is not now, nor will it ever be complete (barring, of course, the end of the Earth or the Park). Many, many people have helped to corral the references contained herein (see below). Any errors of omission and comission are the fault of the editor – who would be grateful to have such errors and omissions pointed out! [[email protected]] ACKNOWLEDGEMENTS As mentioned above, many many people have contributed to building this database of knowledge about Anza-Borrego Desert State Park. A quantum leap was taken somewhere in 2016-17 when Kevin Browne introduced me to Google Scholar – and we were off to the races. Elaine Tulving deserves a special mention for her assistance in dealing with formatting issues, keeping printers working, filing hard copies, ignoring occasional foul language – occasionally falling prey to it herself, and occasionally livening things up with an exclamation of “oh come on now, you just made that word up!” Bob Theriault assisted in many ways and now has a lifetime job, if he wants it, entering these references into Zotero.
    [Show full text]
  • Summits on the Air – ARM for the USA (W7A
    Summits on the Air – ARM for the U.S.A (W7A - Arizona) Summits on the Air U.S.A. (W7A - Arizona) Association Reference Manual Document Reference S53.1 Issue number 5.0 Date of issue 31-October 2020 Participation start date 01-Aug 2010 Authorized Date: 31-October 2020 Association Manager Pete Scola, WA7JTM Summits-on-the-Air an original concept by G3WGV and developed with G3CWI Notice “Summits on the Air” SOTA and the SOTA logo are trademarks of the Programme. This document is copyright of the Programme. All other trademarks and copyrights referenced herein are acknowledged. Document S53.1 Page 1 of 15 Summits on the Air – ARM for the U.S.A (W7A - Arizona) TABLE OF CONTENTS CHANGE CONTROL....................................................................................................................................... 3 DISCLAIMER................................................................................................................................................. 4 1 ASSOCIATION REFERENCE DATA ........................................................................................................... 5 1.1 Program Derivation ...................................................................................................................................................................................... 6 1.2 General Information ..................................................................................................................................................................................... 6 1.3 Final Ascent
    [Show full text]
  • Pdf/48/3/323/3415443/BUL48 3-0323.Pdf by Guest on 25 September 2021 BULLETIN of the GEOLOGICAL SOCIETY of AMERICA VOL
    Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/48/3/323/3415443/BUL48_3-0323.pdf by guest on 25 September 2021 BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 48. PP. 323-348, 3 PUS.. 6 FIGS. MARCH 1. 1937 PHYSIOGRAPHY OF THE AJO REGION, ARIZONA BY JAM ES GILLTTLY CONTENTS Page Introduction................................................................................................................... 323 Mountains....................................................................................................................... 326 Pediments...................................................................................................................... 327 Distribution............................................................................................................ 327 Surface of the pediments...................................................................................... 329 Shape in plan......................................................................................................... 331 Shape in profile...................................................................................................... 332 Shape in cross-section........................................................................................... 333 Bahadas.......................................................................................................................... 335 Drainage.......................................................................................................................
    [Show full text]
  • The Peacocks of Baboquivari Download Free
    THE PEACOCKS OF BABOQUIVARI Author: Erma J. Fisk, Louise Russell Number of Pages: 288 pages Published Date: 01 Aug 1987 Publisher: WW Norton & Co Publication Country: New York, United States Language: English ISBN: 9780393304190 DOWNLOAD: THE PEACOCKS OF BABOQUIVARI The Peacocks of Baboquivari PDF Book Sobol Books. Forbes and Sr. Author: Fisk, Erma J. Bounmee Yang rated it liked it Jan 02, Get A Copy. Through the faculty of reason, all human beings but not any other animals share in the divine reason. Life on the Malec? Anna rated it really liked it Nov 28, Christ's incarnation was accordingly understood as the incarnation of these divine attributes. Sonoran Desert Mon. Read more Guthrie Peak N. The design lends itself well to the path-of-life interpretation as it has no shortcuts, no dead ends, and the entire path must be followed in order to complete the Journey. January 1, P1K. Fisk was a brave, adventurous, and very caring lady. Finalizado: 23 oct BOT. Ajo Peak. Betsy rated it it was amazing Mar 03, Ruth Kehoe rated it really liked it Nov 29, Details if other :. The O'odham people believe that he watches over their people to this day. Jan 30, Chris Babcock rated it it was amazing Shelves: arizona. These are "seeds" of the Logos logoi spermatikoi. We were I'toi's Younger Brothers. Trade Paperback Nonfiction Books. Going to be a great read. She made it all the way till the next May and, upon leaving, realized that she would miss this place for the rest of her days.
    [Show full text]
  • ARIZONA - BLM District and Field Office Boundaries
    ARIZONA - BLM District and Field Office Boundaries Bea ve r Beaver Dam D r S Mountains e COLORADO CITY a a i v D m R (! Cottonwood Point sh RAINBOW LODGE u n a Wilderness C d (! I y W Paria Canyon - A W t ge S Sa GLEN CANYON z Y Cow Butte c A l A RED MESA h a a S Lake Powell t e k h n c h h te K Nokaito Bench ! El 5670 l ( s Vermilion Cliffs Mitchell Mesa a o C hi c S E d h S y a e u rt n W i n m Lost Spring Mountain Wilderness KAIByAo B- e s g u Coyote Butte RECREATION AREA O E h S C L r G H C n Wilderness a i l h FREDONIA r l a h ! r s V i ( N o re M C W v e (! s e m L (! n N l a o CANE BEDS a u l e a TES NEZ IAH W n MEXICAN WATER o k I s n k l A w W y a o M O N U M E N T (! W e GLEN CANYON DAM PAGE S C s A W T W G O c y V MOCCASIN h o k (! k W H a n R T Tse Tonte A o a El 5984 T n PAIUTE e n (! I N o E a N s t M y ES k h n s N e a T Meridian Butte l A o LITTLEFIELD c h I Mokaac Mountain PIPE SPRING e k M e o P A r d g R j o E n i (! J I A H e (! r A C r n d W l H a NATIONAL KAIBAB W U C E N k R a s E A h e i S S u S l d O R A c e e O A C a I C r l T r E MONIMENT A L Black Rock Point r t L n n i M M SWEETWATER r V A L L E Y i N c t N e (! a a h S Paiute U Vermilion Cliffs N.M.
    [Show full text]
  • Status of Mineral Resource Information for the Luke Air Force Range Arizona
    Status of Mineral Resource Information for The Luke Air Force Range Arizona Glenn A. Miller Field Engineer John H. Jett Director Department of Mineral Resources Mineral Building - Fairgrounds Phoenix, Arizona 85007 July, 1979 LIST OF TABLES AND FIGURES TABLE Page I. PRODUCTION DATA FOR ARIZONA'S MAJOR COPPER PRODUCERS WHICH LIE IN CLOSE PROXIMITY TO LUKE AIR FORCE RANGE ........................................ 5 11. PROVEN COPPER RESERVES IN ARIZONA ........................... 8 111. DISCOVERY AND PRODUCTION DATA FOR ARIZONA METAL MINES ............................................... 13 IV. NEW METAL MINES DISCOVERED IN THE SAME GEOLOGICAL PROVINCE AS THE LUKE AIR FORCE RANGE ................................................ 14 V. TEMPERATURE AND MOISTURE READINGS TINAJAS ALTAS MOUNTAINS 1905 ................................ 21 VI. MEAN MAXIMUM AND MINIMUM TEMPERATURES AND ANNUAL MEAN PRECIPITATION FOR SEVERAL ARIZONA TOWNS ...................................... 24 VII. PRODUCTION LA FORTUNA MINE .................................. 40 VIII. MINES, PROSPECTS OR CLAIM GROUPS IN THE FORTUNA MINING DISTRICT WITH NO INFORMATION OTHER THAN A NAME ........................................... 43 IX. UNNAMED MINES AND PROSPECTS IN THE FORTUNA MINING DISTRICT ..................................... 44 X. MINES, PROSPECTS OR CLAIM GROUPS IN THE LA POSA (WELLTON) DISTRICT WITH NO INFORMATION OTHER THAN A NAME ............................... 57 XI. UNNAMED MINES AND PROSPECTS IN THE LA POSA (WELLTON) DISTRICT .................................. 61 XII.
    [Show full text]
  • Flora of Southwestern Arizona
    Felger, R.S., S. Rutman, and J. Malusa. 2014. Ajo Peak to Tinajas Altas: A flora of southwestern Arizona. Part 6. Poaceae – grass family. Phytoneuron 2014-35: 1–139. Published 17 March 2014. ISSN 2153 733X AJO PEAK TO TINAJAS ALTAS: A FLORA OF SOUTHWESTERN ARIZONA Part 6. POACEAE – GRASS FAMILY RICHARD STEPHEN FELGER Herbarium, University of Arizona Tucson, Arizona 85721 & Sky Island Alliance P.O. Box 41165, Tucson, Arizona 85717 *Author for correspondence: [email protected] SUSAN RUTMAN 90 West 10th Street Ajo, Arizona 85321 JIM MALUSA School of Natural Resources and the Environment University of Arizona Tucson, Arizona 85721 [email protected] ABSTRACT A floristic account is provided for the grass family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in southwestern Arizona. This is the second largest family in the flora area after Asteraceae. A total of 97 taxa in 46 genera of grasses are included in this publication, which includes ones established and reproducing in the modern flora (86 taxa in 43 genera), some occurring at the margins of the flora area or no long known from the area, and ice age fossils. At least 28 taxa are known by fossils recovered from packrat middens, five of which have not been found in the modern flora: little barley ( Hordeum pusillum ), cliff muhly ( Muhlenbergia polycaulis ), Paspalum sp., mutton bluegrass ( Poa fendleriana ), and bulb panic grass ( Zuloagaea bulbosa ). Non-native grasses are represented by 27 species, or 28% of the modern grass flora.
    [Show full text]
  • The University of Arizona
    Environmental Isotope Geochemistry in Groundwaters of Southwestern Arizona, USA, and Northwestern Sonora, Mexico: Implications of Groundwater Recharge, Flow, and Residence Time in Transboundary Aquifers Item Type text; Electronic Dissertation Authors Zamora, Hector Alejandro Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 11/10/2021 05:25:45 Link to Item http://hdl.handle.net/10150/631319 ENVIRONMENTAL ISOTOPE GEOCHEMISTRY IN GROUNDWATERS OF SOUTHWESTERN ARIZONA, USA, AND NORTHWESTERN SONORA, MEXICO: IMPLICATIONS FOR GROUNDWATER RECHARGE, FLOW, AND RESIDENCE TIME IN TRANSBOUNDARY AQUIFERS by Hector A. Zamora __________________________ Copyright © Hector A. Zamora 2018 A Dissertation Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 2018 Date: 11/15/2018 Date: 11/15/2018 Date: 11/15/2018 Date: 11/15/2018 Date: 11/15/2018 2 STATEMENT BY THE AUTHOR This dissertation has been submitted in partial fulfillment of the requirements for an advanced degree at the University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this dissertation are allowable without special permission, provided that an accurate acknowledgement of the source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his or her judgment the proposed use of the material is in the interests of scholarship.
    [Show full text]
  • Flora in Southwestern Arizona
    Felger, R.S., S. Rutman, J. Malusa, and M.A. Baker. 2014. Ajo Peak to Tinajas Altas: A flora in southwestern Arizona. Part 7. Eudicots: Cactaceae – Cactus Family. Phytoneuron 2014-69: 1–95. Published 1 July 2014. ISSN 2153 733X AJO PEAK TO TINAJAS ALTAS: A FLORA IN SOUTHWESTERN ARIZONA. PART 7. EUDICOTS: CACTACEAE – CACTUS FAMILY RICHARD STEPHEN FELGER Herbarium, University of Arizona Tucson, Arizona 85721 [email protected] & Sky Island Alliance P.O. Box 41165 Tucson, Arizona 85717 *Author for correspondence: [email protected] SUSAN RUTMAN 90 West 10th Street Ajo, Arizona 85321 JIM MALUSA School of Natural Resources and the Environment University of Arizona Tucson, Arizona 85721 [email protected] MARC A. BAKER College of Liberal Arts and Sciences, School of Life Sciences Arizona State University Main Campus, P.O. Box 874501 Tempe, Arizona 85287-4501 [email protected] ABSTRACT A floristic account is provided for the cactus family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in the heart of the Sonoran Desert in southwestern Arizona. The modern native cactus flora includes 35 taxa in 12 genera, plus 2 non-native prickly- pears that are not established in the flora area. The overall cactus flora including fossils and non- natives totals 39 taxa in 13 genera: at least 17 taxa are represented by fossils recovered from packrat middens, two of which are no longer present in the flora area. This account includes selected synonyms, English, Spanish, and O’odham common names in when available, identification keys, brief descriptions, images, local and general distributional, natural history, and ethnobotanical information.
    [Show full text]
  • A Flora of Southwestern Arizona
    Felger, R.S., S. Rutman, and J. Malusa. 2015. Ajo Peak to Tinajas Altas: A flora of southwestern Arizona. Part 12. Eudicots: Campanulaceae to Cucurbitaceae. Phytoneuron 2015-21: 1–39. Published 30 March 2015. ISSN 2153 733X. AJO PEAK TO TINAJAS ALTAS: A FLORA OF SOUTHWESTERN ARIZONA PART 12. EUDICOTS: CAMPANULACEAE TO CUCURBITACEAE RICHARD STEPHEN FELGER Herbarium, University of Arizona Tucson, Arizona 85721 & Sky Island Alliance P.O. Box 41165 Tucson, Arizona 85717 *Author for correspondence: [email protected] SUSAN RUTMAN 90 West 10th Street Ajo, Arizona 85321 [email protected] JIM MALUSA School of Natural Resources and the Environment University of Arizona Tucson, Arizona 85721 [email protected] ABSTRACT A floristic and natural history account is provided for nine eudicot families as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region at the heart of the Sonoran Desert in southwestern Arizona: Campanulaceae, Cannabaceae, Capparaceae, Caprifoliaceae, Caryophyllaceae, Cleomaceae, Crassulaceae, Crossosomataceae, and Cucurbitaceae. This is the twelfth contribution for this flora, published in Phytoneuron and also posted open access on the website of the University of Arizona Herbarium (ARIZ). This contribution to our flora in southwestern Arizona includes 9 eudicot families, 23 genera, and 25 species: Campanulaceae (2 genera, 2 species); Cannabaceae (2 genera, 3 species); Capparaceae (1 species); Caprifoliaceae (1 species); Caryophyllaceae (6 genera, 6 species); Cleomaceae (2 genera, 2 species); Crassulaceae (3 genera, 3 species); Crossosomataceae (1 species); and Cucurbitaceae (5 genera, 6 species). A synopsis of local distributions and growth forms of the nine families is given in Table 1.
    [Show full text]
  • K-Ar Geochronology and Geologic History of Southwestern Arizona and Adjacent Areas
    Arizona Geological Society Digest, Volume XII, 1980 201 K-Ar Geochronology and Geologic History of Southwestern Arizona and Adjacent Areas by 2 3 M. Shafiqullah , P.E. Damonl , D.J. Lynch l, S.J. Reynolds , WA. Rehrig , 4 and R.N. Raymond A bstract This paper presents K-Ar ages of 174 samples from 154 localities in southwestern Ari- zona and adjacent areas with a summary of the geologic history. Ages are given for many rock units that had been "dated" previously only by lithologic correlations. These ages establish the timing of the magmatic and tectonic events that created and deformed the rocks. We interpret the older Precambrian history of Arizona as the result of a long-enduring and evolving convergent continental margin with accretion to the southeast at the rate of 2 km/m.y. This process was terminated 1.4 b.y. ago by the intrusion of vast batholiths ex- tending in a northeasterly direction far beyond Arizona. Younger Precambrian rocks ac- cumulated in an epicontinental sea along the trend of the Cordilleran geosyncline. These rocks were intruded by extensive diabase sills that are best preserved in the central moun- tain region. There is no further record of Precambrian magmatism or sedimentation after intrusion of the diabase sills. Some Precambrian K-Ar dates have been reset by the thermal disturbance that accompanied these intrusions. K-Ar ages that fall within the Paleozoic are reset ages and there is no evidence for any Paleozoic magmatism in the region. K-Ar ages of most of the pre-Laramide Mesozoic igneous rocks in the region have been reset by Laramide magmatism but evidence has been found for Early to Late Jurassic magmatism.
    [Show full text]