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         Paleogeography:     more books (100)
  1. Late Pennsylvanian and Early Permian Cyclic Sedimentation, Paleogeography, Paleoecology and Biostratigraphy in Kansas and Nebraska by Roger K. & Diffendal, R. F. Pabian, 1989-01-01
  2. Mesozoic Paleogeography of the West-Central United States: Rocky Mountain Paleogeography Symposium 2 by Mitchell W. Reynolds & Edward D. Dolly, 1983-01-01
  3. Cenozoic Paleogeography of the Western United States by John, M. Armentrout, 1979
  4. Paleozoic Paleogeography of the Western United States - II, 1 (Pacific Section Sepm)
  5. Atlas of early and middle Paleozoic paleogeography of the southern Great Lakes area (Geological Survey special report 32) by John B. Droste, 1983
  6. Subsurface geology and paleogeography of Queens County, Long Island, New York (Geological Survey) by Julian Soren, 1978
  7. The impact of paleogeography, pCO"2, poleward ocean heat transport and sea level change on global cooling during the Late Ordovician [An article from: ... Palaeoclimatology, Palaeoecology] by A.D. Herrmann, M.E. Patzkowsky, et all 2004-04-13
  8. Paleozoic paleogeography of the western United States
  9. Parasites and the Aid They Give in Problems of Taxonomy, Geographical Distribution, and Paleogeography. Contained in Smithsonian Miscellaneous Collections, Volume 81, Issue 8 pages 1-36. by maynard M. Metcalf , 1929-01-01
  10. Washington Geology [ Vol. 25 No. 3, Sep. 1997 ] (In this Issue: Paleogeography and paleontology of the early Territory Chuckanut Formation, northwest Washington, Preliminary study of minerals in Tacoma smelter slags, Surface Mine Reclamation Awards)
  11. Petrology and Paleogeography of the Warrensburg Channel Sandstone, Western Missouri by Robert W. and Hubert, John F. Doty, 1962
  12. Paleogeography: Messinian Salinity Crisis
  13. MESOZOIC PALEOGEOGRAPHY OF THE WESTERN UNITED STATES Symposium 2
  14. Report of the Twenty-First Session of the International Geological Congress 1960 - Part 12: Regional Paleogeography by Theodor (ed) Sorgenfrei, 1960

21. Paleontology, Paleogeography, Paleoclimatology (Paleontological Society)
830 AM1210 PM, Hotel NH Krystal Mismaloya. Paleontology, paleogeography, Paleoclimatology(Paleontological Society). Ralph Hitz, Presiding. Paper , Start Time,
http://gsa.confex.com/gsa/2003CD/finalprogram/session_9169.htm
Session No. 30 Thursday, April 3, 2003 8:30 AM-12:10 PM, Hotel NH Krystal: Mismaloya Paleontology, Paleogeography, Paleoclimatology (Paleontological Society) Ralph Hitz, Presiding Paper # Start Time 8:30 AM Introductory Remarks 8:35 AM PALEOCLIMATIC IMPLICATIONS OF FOSSILIFEROUS LATE QUATERNARY EOLIAN AND FLUVIO-LACUSTRINE SEDIMENTS, SOUTHEASTERN WASHINGTON : SPENCER, Patrick K., Geology Department, Whitman College, 345 Boyer Ave, Walla Walla, WA 99362-2067, spencerp@whitman.edu. 8:55 AM WIDESPREAD DETRIMENTAL OCEANIC CONDITIONS ALONG THE WESTERN MARGIN OF NORTH AMERICA DURING THE EARLY TRIASSIC: ANOXIA WITHOUT BORDERS : WOODS, Adam D., Department of Physical Sciences, Santa Ana College, 1530 West 17th St, Santa Ana, CA 92706, woods_adam@rsccd.org. 9:15 AM PALEOBIOGEOGRAPHY OF THE FOSSIL DECAPOD CRUSTACEANS OF THE NORTHEASTERN PACIFIC OCEAN: EXPANDING THE FOSSIL RECORD OF THE GENUS RANINA : NYBORG, Torrey G. , GARIBAY_ROMERO, Luis M. , VEGA, Francisco J. , and FAM, John , (1) Natural Sciences Department, Loma Linda Univ, Loma Linda, CA 92350, tnyborg06g@ns.llu.edu, (2) Instituto de Geologia, UNAM, Ciudad Universitaria, D. F. 04510, Mexico, (3) 1404-1199 Eastwood St, Coquitlam, BC, V3B-7W7, Canada 9:35 AM DUAL ORIGIN FOR AUSTRALIA'S PLEISTOCENE REPTILIAN FAUNA: EVIDENCE FOR A LATE CRETACEOUS DISPERSAL FROM ANTARCTICA : CASE, Judd A., Dept. of Biology, Saint Mary's College of California, P.O. Box 4507, Moraga, CA 94575, jcase@stmarys-ca.edu, CASE, Dana A., Concord High School, Concord, CA 94520, MARTIN, James E., Museum of Geology, South Dakota School of Mines and Technology, 501 E. St. Joseph Street, Rapid City, SD 57701, and MEREDITH, Robert, Dept. of Biology, Univ of California, Riverside, Riverside, CA 92521

22. Paleogeography And Geology
Course descriptions paleogeography and Geology. 3503. paleogeography of the TemperateZone in the Past 20,000 years. 2,5 ECTS. Prof. Leszek Starkel Ph.
http://www.geo.uj.edu.pl/eng/edu/desc/phys/paleo.htm
Course descriptions - Paleogeography and Geology Paleogeography of the Temperate Zone in the Past 20,000 years 2,5 ECTS
Prof. Leszek Starkel Ph. D. , Institute of Geography and Land Management PAN Hours and type of classes: 15 hours - lecture Semester: autumn Completion requirements: oral examination Entry conditions: 3506 Geology of the Quaternary Course outline: Methods of the reconstruction of water circulation and balance in the past. Mechanisms of changes in the amount of precipitation, runoff and evaporation. Changes of the type and zones of water retention in the glacial-interglacial cycle. Role of extreme phenomena in the past. Increasing human impact in the Holocene and recent centuries as the cause of the accelerated circulation and the shrinking of water reserves.
Practical Classes in Geology 5 ECTS
Bogus³aw Ko³odziej M. Sc., Mariusz Kêdzierski M. Sc. , Institute of Geological Sciences UJ Hours and type of classes: 30 hours - laboratory and field classes (3 groups maximum) Semester: spring Completion requirements: written examination Entry conditions: - Course outline: Physical and chemical properties of rock-forming minerals. Macroscopic identification of minerals. Identification of igneous, sedimentary and metamorphic rocks. Elements of tectonics. Elements of historical geology. Reading geological structure and history from a map. Using a geological compass.

23. Mesozoic Paleogeography: Movie
NAU Mesozoic paleogeography images. The set of images loading below totals justunder 3 Mb (but then you'll have the whole Mesozoic plus the Permian).
http://www.colorado.edu/GeolSci/Resources/NAUMesozoicMovie.html
NAU Mesozoic Paleogeography images
The set of images loading below totals just under 3 Mb (but then you'll have the whole Mesozoic plus the Permian). This uses Shockwave 7.0; your browser will alert you if you need to update (it is possible that one of the computer room computers will not allow you to update shockwave; then you'll want to go to the original source at Northern Arizona University). These movies also put some demand on your browser; some browsers might need more memory and should alert you if space is tight. These images were made by Ronald Blakely at Northern Arizona University. The global images are roughly centered on Laurentia (which is mainly the core of modern North America), which was rotated a little clockwise relative to today (so the west coast is on the upper left in most of these images). The western U.S. images have two flavors: a paleogeographic image, and a structural elements image. There is some text for each image at the NAU site . Organization of the images into this "movie" was done here at CU. To navigate, click on the main image to go forward in time. To see the associated western U.S. image from the global map, click on the "WUS" in the lower right corner. To see the associated global image from the western U.S. image, click on the mini-globe in the lower right. To go back one image, click on the back arrow. You can also

24. Paleozoic Paleogeography Movie
NAU Paleozoic paleogeography images. The set of images loading belowtotals 3 Mb (but then you'll have the whole Paleozoic). This
http://www.colorado.edu/GeolSci/Resources/PzPaleoMovie.html
NAU Paleozoic Paleogeography images
The set of images loading below totals 3 Mb (but then you'll have the whole Paleozoic). This uses Shockwave 7.0; your browser will alert you if you need to update (it is possible that one of the computer room computers will not allow you to update shockwave; then you'll want to go to the original source at Northern Arizona University) These images were made by Ronald Blakely NAU site . Organization of the images into this "movie" was done here at CU. To navigate, click on the main image to go forward in time. To see the associated western U.S. image from the global map, click on the "WUS" in the lower right corner. To see the associated global image from the western U.S. image, click on the mini-globe in the lower right. To go back one image, click on the back arrow.

25. Teaching Geology At CU Resources
paleogeography movies of the southwestern United States and the western hemisphere based upon maps made at Northern Arizona by Ron Blakely.
http://www.colorado.edu/GeolSci/Resources/
Go to the no-frames (no navigation) content of the resource index Go to the no-frames (no navigation) content of the resource index

26. Significance Of Paleostructure And Paleogeography Of Ordovician-Silurian Rock As
Significance of Paleostructure and paleogeography of OrdovicianSilurianRock Associations in Northern Xinjiang,China. HE Guoqi, LI Maosong.
http://www.pku.edu.cn/academic/xb/2001/_01e118.html
Significance of Paleostructure and Paleogeography
of Ordovician-Silurian Rock Associations in
Northern Xinjiang,China
HE Guoqi, LI Maosong (Department of Geology,Peking University,Beijing,100871)

Abstract: Key words:
northern Xinjiang; Ordovicianª²Silurian system; rock association; paleostructure; paleogeography
£¨R.D.2000-06-14 P.D.2001-01-20 Vol.37 No.1 pp.99¡«110£©
To Total contents To Contents(Geology and Geography)

27. Paleogeography I
paleogeography I. Structure of the Earth. Materials of different densities compositionform concentric zones. Core. Inner Core. Highest density. Solid FeNi.
http://grove.ufl.edu/~jlabs/paleogeoI.htm
Paleogeography I Structure of the Earth Core Inner Core Highest density Solid Fe-Ni Outer Core Liquid Fe-Ni Mantle Lower Fe-Mg silicates solid Upper Less dense than lower mantle Asthenosphere Partially molten plastic Lithosphere rigid Crust Outer most layer Part of the lithosphere 2 types: Continental Thick Oceanic Thin Continental Drift Wegener developed theory Proposed: All land masses were originally united into single super continent and drifted apart Pangea Wasn’t excepted until 1960’s Evidence Continental Fit Close resemblance between coastlines Glacial Evidence Deposits of till striations Fossil Evidence Fossil of same organism found on different continents Plate Tectonic Theory Rigid lithosphere consists of plates Lithosphere overlies hotter weaker semi plastic asthenosphere Lithospheric plates move over asthenosphere Plate Boundaries Divergent Spreading ridges New oceanic lithosphere forms Crust is being: Thinned Extended fractured Convergent Destruction of crust Characterized by: Volcanism Mt. Building Metamorphism Earthquake activity 3 types Oceanic-Oceanic boundaries 2 oceanic plates collide 1 subducts under the other Continental-Continental Boundaries 2 continents approach each other Welded together Form mt. range

28. Phanerozoic Paleogeography
Phanerozoic paleogeography. paleogeography geography of the geologicpast. 1) positions of ancient continents. 2) extent of mountains
http://www.geosc.psu.edu/People/Faculty/FacultyPages/Patzkowsky/paleogeography.h

29. Geosc 204 Paleogeography Lab
GEOSC 204 Geobiology LAB 2 paleogeography. Part 1. Plate tectonics. Go tothe What on Earth is Plate Tectonics? page of the US Geological Survey.
http://www.geosc.psu.edu/~azerkle/Labs/Lab_2_Paleogeography.html

30. Regional Geology And Structural Timing Of Tethys - Paleogeography And Hydrocarbo
Regional Geology and Structural Timing of Tethys paleogeography and HydrocarbonSystems Room Exhibits Hall 2 Poster session is from 900 AM to 600 PM Co
http://aapg.confex.com/aapg/cairo2002/techprogram/session_1859.htm
Regional Geology and Structural Timing of Tethys - Paleogeography and Hydrocarbon Systems
Room Exhibits Hall 2
Poster session is from 9:00 AM to 6:00 PM Co-Chairs: M. F. Brunet and J. D. Pigott
Booth #: P3 J. Mascle, L. Loncke, O. Sardou, P. J. Boucher, V. Felt: Evidences of Fluid Escape Structures and Mud Volcanoes on the Nile Deep Sea Fan Booth #: P4 S. Z. Jassim: Events Surrounding the Rutba Uplift in Western Iraq Booth #: P5 S. Z. Jassim, I. W. Somerton: The "Hercynian" Disturbance in Arabia and North Africa Booth #: P6 I. A. Al-Jallal: Effective Use of Depositional and Diagenetic Tools to Predict Good Reservoir Quality of Khuff Formation in Eastern Saudi Arabia, and the Gulf Countries Booth #: P7 A. Bozcu, A. Poisson: Review of Oil and Gas Occurrences in SW Turkey Booth #: P8 A. Harutyunyan, S. Abovyan, G. Babayan, A. Barseghyan, A. Soghomonyan: Composition, Structure, Evolution and Formation of Hydrocarbons in the Earth Crust of Lesser Caucasus Booth #: P9 O. Sardou, J. Mascle, L. Loncke, P. Boucher, V. Felt: Morphology of the Nile Deep-sea Fan from Combined Swath Bathymetry and 3D Seismic Data First Arrivals Booth #: P10 V. I. Savtchenko:

31. Integrating Paleogeography With Regional Salt Tectonics - Implications For Sub-s
Integrating paleogeography with Regional Salt Tectonics Implicationsfor Sub-salt Exploration in the Gulf of Mexico. Andrew Mehlhop
http://aapg.confex.com/aapg/sl2003/techprogram/paper_80568.htm
Integrating Paleogeography with Regional Salt Tectonics - Implications for Sub-salt Exploration in the Gulf of Mexico
Andrew Mehlhop , Frontier Exploration, Anadarko Canada Corporation, 1500 425 1st Street SW, Calgary, AB T2P 4V4 Canada, phone: 403-231-0354, andrew_mehlhop@anadarko.com Current structural models subdivide the Northern Gulf of Mexico into distinct tectonostratigraphic provinces. These provinces are primarily influenced by the following first-order controls: depth and structure of the basement, original thickness of Jurassic mother salt, and the thickness and distribution of Tertiary clastic depositional sequences. Each province exhibits a unique salt inflation/deflation history that differs from adjacent provinces (Hall, 2001). Additionally, current depositional models have effectively tied the up-dip sedimentation on the shelf using well control to deep basin seismic stratigraphy outboard of the present day Sigsbee escarpment. However, regional depositional studies have generally left a large gap across the complex and poorly imaged sub-salt terrain across the outer shelf and deep water. An integrated regional approach is used in this study as a predictive tool to address the remaining sub-salt play potential in the Gulf of Mexico. The methodology utilizes an understanding of salt geometry and loading history on a regional scale to predict the age and nature of lithologic facies in areas that are poorly understood due to sub-salt seismic imaging issues. Stratigraphic objectives, structural play-types, and salt evolution for each tectonostratigraphic province are presented with an emphasis on sub-salt exploration. Finally, this integrated approach is combined with well, seismic, gravity, magnetic, and biostratigraphic data to produce a suite of paleogeographic maps for the Gulf of Mexico. These paleogeographic maps combine the structural and stratigraphic history of the Gulf of Mexico in a unique manner. This integrated methodology is an effective way to illustrate the dynamics of salt/sediment interaction on a regional scale.

32. Silurian Paleogeography
Geology / Maps. The position of land masses as long ago as four hundredmillion years ago was totally different to that of today.
http://www.silurian.com/geology/maps.htm

Index

Background

Life

Timeline
...
Gallery
Geology / Maps
The position of land masses as long ago as four hundred million years ago was totally different to that of today. With the motion and collision of the plates that make up the earth's crust the location and climate of familiar 'hot' or 'cold' places bears little relation to the present. In the North Atlantic area the Silurian marked the closure of the great 'Iapetus' Ocean that separated North America from Northern Europe. At that time, even though the boundary of the Eastern edge of North America was more or less in the same position as today, Newfoundland and a portion of Eastmost America was on the South of the ocean together with England and Ireland. Northern Ireland and Scotland were on the Northern flank. The end of the Silurian saw the forming of massive mountain ranges along the edges of the two continental margins, and in England a move to deposition of sediments derived from the new mountains so creating the Devonian system. The deposition of Silurian rocks was widespread worldwide.

33. Dinosaur University - Paleogeography & Sea-Level Changes
paleogeography ( ancient geography ) is an historical geologist's best descriptionand interpretation of the distribution of major features of the Earth (ie
http://www.auburn.edu/~kingdat/chap3.htm
Paleogeography ("ancient geography") is an historical geologist's best description and interpretation of the distribution of major features of the Earth (i.e., global scale) and fine details of ancient environments (i.e., local scale). Important factors in determining paleogeographic reconstruction are the movement of Earth's crustal plates (and the continents upon those plates), and the changing of global sea levels. Both the position of crustal plates (continents) and global sea levels have been changing constantly over geological time and continue to do so today. Crustal plate movement creates zones of instability (marked by great crustal faults, explosive volcanoes, and great earthquake belts). Eventually, continental collision and resultant mountain building occur because plate motion does not stop. Global sea-level change inundates continental margins creating continental shelves and vast interior seaways on continents. Given long spans of time (say several hundred million years), continents tend to cluster together and attach themselves by collision. As recently as 250 million years ago, all the continents were joined in a great L-shaped supercontinent called Pangaea ("all lands") that straddled the equator and there was one great global ocean, Panthalassa.

34. Chitinozoans Biostratigraphy And Paleogeography.
Translate this page Les fichiers des années antérieures sont également disponibles. Titredu projet Chitinozoans biostratigraphy and paleogeography.
http://www.uquebec.ca/uqss/IRS/INRS/data/1989L0063.html
Inventaire de la recherche subventionnée et commanditée
Les données qui suivent proviennent du fichier de la recherche subventionnée et commanditée à l'Université du Québec pour l'année 2000-2001. Ce fichier est produit annuellement par la direction des études de cycles supérieurs et de la recherche de la vice-présidence à l'enseignement et à la recherche de l'Université du Québec. L'Inventaire regroupe les projets de recherche qui ont été entrepris ou poursuivis au cours de l'année s'étendant du 1er avril 2000 au 31 mars 2001 . Il contient les projets de recherche auxquels participent des professeurs de l'Université du Québec et qui ont reçu un support financier de la part de sources internes ou externes. Les fichiers des années antérieures sont également disponibles. Titre du projet:
Chitinozoans biostratigraphy and paleogeography.
Établissement(s) impliqué(s):
Institut National de la Recherche Scientifique (INRS)
Responsable(s):
Achab, Aïcha (INRS)
Année:
Unité de recherche:
INRS-Géoressources, INRS
Organisme pourvoyeur: Conseil de recherches en sciences naturelles et en génie du Canada
Montant accordé:
Page d'accueil de ce document
Pour toute information concernant un projet de recherche, vous pouvez communiquer avec le responsable du projet en consultant le

35. Paleogeography And Paleoclimatology
AD.COM, Search paleogeography and Paleoclimatology. Top Science Earth_Sciences 16,paleogeography of the Southwestern US. Maps showing period
http://www.ad.com/Science/Earth_Sciences/Paleogeography_and_Paleoclimatology/
search
Top
Categories:
Caribbean Tectonic Reconstructions Reconstructions of the Caribbean at various times in the geologic past (past 200 million years)
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology
http://www.fiu.edu/orgs/caribgeol/Caribreconstr.html
Evolution of the Colorado River and its Tributaries
Article introducing a model for the evolution of the Colorado River and the origin of the Grand Canyon.
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology
http://www.durangobill.com/Paleorivers_preface.html
Friends of Palaeobiogeography
International scientific working group dealing with the geographical distributions of organisms through geological time.
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology http://www.paleobiogeography.org/ Geology Resources at Colorado University Paleogeography "movies" of the southwestern United States and the western hemisphere based upon maps made at Northern Arizona by Ron Blakely. Category: Science > Earth Sciences > Paleogeography and Paleoclimatology http://www.colorado.edu/GeolSci/Resources/

36. Paleogeography And Paleoclimatology
AD.COM Web Directory, search, paleogeography and Paleoclimatology.Top Science 16, paleogeography of the Southwestern US. Maps showing
http://www.ad.com/Science/P/__Paleogeography/
search
Top
Categories:
Caribbean Tectonic Reconstructions Reconstructions of the Caribbean at various times in the geologic past (past 200 million years)
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology
http://www.fiu.edu/orgs/caribgeol/Caribreconstr.html
Evolution of the Colorado River and its Tributaries
Article introducing a model for the evolution of the Colorado River and the origin of the Grand Canyon.
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology
http://www.durangobill.com/Paleorivers_preface.html
Friends of Palaeobiogeography
International scientific working group dealing with the geographical distributions of organisms through geological time.
Category: Science > Earth Sciences > Paleogeography and Paleoclimatology http://www.paleobiogeography.org/ Geology Resources at Colorado University Paleogeography "movies" of the southwestern United States and the western hemisphere based upon maps made at Northern Arizona by Ron Blakely. Category: Science > Earth Sciences > Paleogeography and Paleoclimatology http://www.colorado.edu/GeolSci/Resources/

37. PALEOGEOGRAPHY TITLE
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38. Jurassic Paleogeography And Biogeography Of West-central Pangaea

http://www.ig.utexas.edu/CaribPlate/forum/iturralde_0601/intro.htm
Return to Caribbean Plate Origin Forum
Jurassic paleogeography and biogeography of west-central Pangaea:
Some preliminary notes
by Manuel Iturralde-Vinent These Powerpoint animations were to be presented at: Caribbean Mesozoic Biogeography: Paleontological Constraints to the Formation and Early Evolution of the Caribbean Seaway
7th North American Paleontological Convention
University of California at Berkeley
June 26-July 1, 2001 Comments and questions should be directed to: Manuel A. Iturralde-Vinent ( iturralde@mnhnc.inf.cu This page last modified: July 11, 2001

39. Paleogeography - Animated Film
HOME. FEEDBACK FROM GEOLOGISTS WELCOMED! PALEOGEOLOGICAL EVENTS TOBE PORTRAYED in Earth Moves . As originally compiled by Stephen
http://mypage.direct.ca/w/writer/events.html
[HOME] FEEDBACK FROM GEOLOGISTS WELCOMED! PALEOGEOLOGICAL EVENTS TO BE PORTRAYED
in
"Earth Moves"
As originally compiled by Stephen X. Arthur in 1999
(revisions 2000 not posted) COMMON FIRST PART OF FILMS 1-4: PALEOZOIC NORTH AMERICA: NOTE: The cratonic deposition sequences of Sloss (revised) and the Vail curves for eustatic sea-level fluctuations are basis for animation of coastlines and shallow sea transgressions. They provide both large scale flooding periods as well as secondary "heart-beat" pulses and even some faster flutter of coastlines. These will be combined at all stages with specific outlines as delineated in several sources from interpretation of local stratigraphy, which include the additional local effects of downwarped foreland basins inland from orogenic zones, etc. The many inbetween stages of inland seas are only hinted at here (see various paleomaps). The West is a Cordilleran Seaway throughout this period. Many subsiding basins are filling with sediment shed from various eroding uplifts throughout this period (for example Ozark dome into Illinois Basin). These features and processes are identified but are not specified in the minimal outline below. CAMBRIAN/ORDOVICIAN
  • Wrangellia superterrane arc is already migrating via transverse faulting along the Pacific subduction zone from the Ural Mountains in the form of the Talkeetna and Bonanza arcs, to later become part of BC as colliding Gravina Arc (Film 2).
  • 40. Image Index Page For Grand Canyon Paleogeography (historical Geology) Pictures
    s and 3-D Pictures, The Evolution of the......Durango Bill's paleogeography (Historical Geology) Research, ImageIndex Short
    http://www.durangobill.com/ImageIndex.html
    Durango Bill's
    Paleogeography (Historical Geology) Research Image Index - Short Descriptions and 3-D Pictures The Evolution of the Colorado River (and origin of the Grand Canyon) is interrelated with the historical geology of many other locations in the southwestern U.S. Clicking on each of the following links will display a page containing a small computer generated 3-D map image of the area plus a brief description of the pertinent geologic significance. Clicking on any small image will produce a large map/picture.
    "Barbed" Tributaries:
    The Marble Canyon section of the Grand Canyon has several arroyo/canyons that flow "against the grain" of the Colorado River drainage. These canyons are all less than 3 million years old, and a model for their origin/formation is given.
    Black Canyon of the Gunnison River, Colorado:
    The Black Canyon has the greatest depth to width ratio of any canyon in the Colorado River system. It appears to be very young, and there is an impossible contradiction in the "standard explanation" of its origin. A new model for its origin is given.
    Canyon of Lodore, Colorado:

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