Slide 2 White areas represent sequences of rocks Cratonic
Sequences of North America that are separate d by large- scale
uncon- formities shown in brown Slide 3 During the Triassic Period
Paleogeography of the World Slide 4 Jurassic Slide 5 During the
Late Cretaceous Period Paleogeography of the World Slide 6
Evaporites accumulated in shallow basins as Pangaea broke apart
during the Early Mesozoic Water from the Tethys Sea flowed into the
Central Atlantic Ocean Early Mesozoic Evaporites Slide 7 Marine
water flowed into the southern Atlantic Ocean from the south Thick
Southern Ocean Evaporites Slide 8 Late Cretaceous note the seaway
in central US Slide 9 The world's climates result from the complex
interaction between wind and ocean currents and the location and
topography of the continents In general, dry climates occur on
large landmasses in areas remote from sources of moisture and where
barriers to moist air exist, such as mountain ranges Wet climates
occur near large bodies of water or where winds can carry moist air
over land Ocean Currents and Continents Slide 10 Slide 11
Widespread Triassic evaporites, red beds, and desert dunes: such as
Zion National Park which began in the Jurassic in the low and
middle latitudes of North and South America, Europe, and Africa
indicate dry climates in those regions, while coal deposits are
found mainly in the high latitudes, indicating humid conditions
These high-latitude coals are analogous to today's Scottish peat
bog or Canadian muskeg Evaporites, Red Beds, Dunes, Coal Slide 12
Slide 13 Newark and Hartford Basins form Widespread igneous
intrusions Areas where Triassic fault-block basin deposits crop out
in eastern North America Slide 14 This sill was one of many that
were intruded into the Newark sediments during the Late Triassic
rifting that marked the separation of North America from Africa
Palisades Sill of the Hudson River Slide 15 Reptile Tracks Reptile
tracks in the Triassic Newark Group were uncovered during the
excavation for a new state building in Hartford, Connecticut
Because the tracks were so spectacular, the building side was moved
and the excavation was designated as a state park Slide 16 Mesozoic
Cephalapods Slide 17 White Cliffs of Dover, UK Slide 18 Lived and
died in clear warm seas that covered much of Britain around 70 to
100 million years ago. When they died, they fell to the bottom in a
rain of fine white mud. As chalk formed from the mud, layers and
lumps of hard, glassy flint also developed - prized by stone-age
man for tools. Slide 19 Latimeria belongs to a group of fish once
thought to have gone extinct at the end of the Mesozoic Era A
specimen was caught off the coast of East Africa in 1938 Since then
many more have been captured Living Fossil Slide 20 Reptiles and
Birds Slide 21 All dinosaurs possess a number of shared
characteristics, such as full and upright posture with limbs
directly beneath their bodies yet differ enough for us to recognize
two distinct orders, the Saurischia and Ornithischia A distinctive
pelvic structure characterizes each order Slide 22 Cladogram
showing dinosaur relationships showing pelvises of ornithischians
and saurischians Among the several subgroups of dinosaurs Dinosaur
Cladogram theropods were carnivores and all others were herbivores
Slide 23 Missoula, MT Museum of the Rockies Jack Horner, curator
Slide 24 Dinosaur Provincial ParkAlberta, Canada Slide 25 Slide 26
Slide 27 Slide 28 Slide 29 Slide 30 Slide 31 Slide 32 Slide 33 m
Slide 34 1966 Tracks discovered during construction project in
Rocky Hill, CT 2066 Tracks discovered near Rocky Hill, CT Slide 35
Top events of the Cenozoic 65 mya Cretaceous Sea dries up
Subtropical climate in US Plate tectonics moves to the Western US
Farallon Plate subducts under N.A. Today remnants are allegedly
found under the eastern US uplift of the western states flow of the
Colorado River formation of Grand Canyon begins Slide 36 Formation
of Panama central America animals unique to N and S America now
migrate and compete only one marsupial in NA Camels, horses, sloths
Australopithecines evolve before 1.8 mya Large mammals such as
mammoths, mastodons, saber tooth cats, dwell in cooling NA Species
of homo habilis and ancestors of homo sapiens evolve. Neanderthal
Humans ice age over 1 my Slide 37 Nov. 2011 Asteroid YU55 passes
Earth inside of moons orbit 860,000 miles from Earth Slide 38 A
preliminary orbit calculation shows that 2012 DA14 has a very
Earth-like orbit with a period of 366.24 days, just one more day
than our terrestrial year, and it jumps inside and outside of the
path of Earth two times per year. While an impact with Earth has
been ruled out on the asteroids next visit, astronomers will use
that close approach for more studies and calculate the Earth and
Moons gravitational effects on it. (Credit: Deimos-Space) Yellow:
asteroid around sun Green: Earth orbit around sun Orbit of DA16 =
366.24 Earth days Orbit of Earth = 365.25 Slide 39 Its back.Feb. 15
th, 2013 cannot pass closer than 3.2 Earth radii about 17,000
miles
