QUESTIONS: 1a. How many different cratons exist in this new world? How do you know? Color in each of these areas with a different color and provide a simple legend for your colors. Six 1b. How many pieces of different cratons make up Nesmith? How might this have occurred? Three 2a. Which columns preserve cratonic sequences? A, B, D, E, H, I, J 2b. What do these sections say about changes in eustatic sea level over time? Transgressed from Cambrian to Permian, regressed from Permian to Present 3a. How many different continental landmasses were there in the Cambrian? Three 3b. Which cratons were sutured together? How do you know? Kingsbury, James, Nesmith; you can tell based on the fossils 3c. When did they rift apart? How can you tell? Ordovician; based on the lithology 4a. At one point in time, Nesmith and Hewitt were sutured together. When did they begin moving towards each other? How do you know? Ordovician; volcanics in C, ash deposits in G 4b. When did they begin to collide? Devonian 4c. When did they become completely sutured? Carboniferous 4d. When did they rift apart? Cretaceous 5a. What kind of feature do you think column L represents? Why? An island arc; gabbro basement, basalt flows 5b. When did L form? Permian 5c. When did it begin to collide with James? Tertiary 6. What is the age of the mountain belt to the southeast of column D? Jurassic-Cretaceous 7. When did the volcanics on Kingsbury start? What do you think caused this to happen? Quaternary; the collision of the island arc with James caused the direction of subduction to switch. 8. How many different orogenic events have occurred during this world's history? Eight 9. Draw a paleogeographic map of the mock world for the Cambrian, Carboniferous and the Cretaceous. Each map should show the relative location of the continents and the location of major mountain belts (if they existed at that time). See teacher's key PLANET SALISBURY PRESENT DAY TECTONIC AND PHYSIOGRAPHIC REGIME KINGSBURY A MORSE B D E L C K F G H I J HEWITT JAMES LEGEND Continental crust boundary Mid-ocean Ridge Subduction zone Transform Fault N Mountains Young Old B R R Eroding Craton Divergence Passive Margin A Q Q B T A T K K J J B Pm Pm C C Passive Margin D B A D S S O O B C A C Cratonic Basement Cratonic Basement 1.5 by 2.2 by Divergent Convergent Ash Layers Flysch Molasse Active Margin Andesite Convergence Convergence Suture Suture Tr A Eroding Craton Tr Columnar Basalt Arkose Igneous Rocks Granite Diorite Gabbro Passive Margin / Cratonic Non-deposition Sandstone Siltstone Shale Limestone IDEALIZED SEA-LEVEL TREND Continental Interior Deposition Time Time Erosion Continental Margin E F G H C D I L B K A J B A C R R R Q Q Q T T T K K K J J J Tr Tr Tr Pm Pm Pm C C C D D D S S S O O O C C C 2.7 by 2.7 by 2.7 by D E F R R R Q Q Q T T T K K K J J J Tr Tr Tr Pm Pm Pm C C C D D D S S S O O O C C C 2.4 by 1.8 by 1.8 by H G I R R R Q Q Q T T K K J J Tr Tr Pm Pm C C D D S S O O O C C C 1.8 by T K J Tr Pm C D S 1.2 by 1.5 by K J L R R R Q Q Q T T T K K K J J J Tr Tr Tr Pm Pm Pm C C D D S S O O C C 1.5 by 280 my 2.7 by A A A A B B B B D E L E E CC E L F KK D CC F F G KK G G II JJ I I F G H JJ H Present Cretaceous A A D B B A D A BB E L CC G G KK E F E CC F G H II JJ F H J J Permian Carboniferous D D A E A B B F G CC II A F G H G K C JJ II 2.4 by G H Cambrian Ordovician 2.7 by E A E B B JJ F G KK II KK E 1.8 by 1.5 by 1.2 by 280 my F