Field Trip #3: Paleozoic Rocks II.


80 views
Uploaded on:
Description
Geography. Manual of the Geology of Travis County. marine. high silt supply. turbidites ... http://www4.nau.edu/topography/master.html?http://www4.nau.edu/geography ...
Transcripts
Slide 1

Field Trip #3: Paleozoic Rocks II Cretaceous Stratigraphy of Central Texas

Slide 3

Field Trip #3: Paleozoic Rocks II Location Geology Assignment/Methods Reminders Text: Manual, p. 267-278; Compton, p. 166-171; 182-184; 242-243.

Slide 4

Location Hamilton Creek Stop 1 (E. McBride) Stop 2 street cut close Max Starke Dam (E. McBride)

Slide 5

Location Creek close Stop 2 (Luis Garcia)

Slide 7

Geology

Slide 8

Geology Paleozoic Sedimentary Rocks Pennsylvanian – Smithwick Shale Ordovician – Honeycut Formation of Ellenburger Group Bastrop N 5 miles

Slide 9

(Manual, p. 272)

Slide 10

Geology Paleozoic Events Flooding by Shallow Seas Uplift Ouachita Mts (Penn) Faulting (Penn) Erosion of Ouachitas (P-J)

Slide 11

Geology Ellenburger Group sabkha evaporites karst common gas - subsurface (nps.gov)

Slide 12

Geology Guidebook of the Geology of Travis County

Slide 13

Geology Smithwick Shale marine high dregs supply turbidites (E. McBride)

Slide 14

Field Trip #3: Paleozoic Rocks II Location Geology Assignment/Methods Reminders Text: Manual, p. 267-278; Compton, p. 166-171; 182-184; 242-243.

Slide 15

Assignment/Methods 1) Smithwick Shale Paleocurrent and Deformation Features measure and plot the introduction of: 1) joints 2) issues 3) sandstone dams 4) fossil wood pieces 5) ebb and flow swells and solemarks

Slide 16

sandstone feeder bed sandstone dam (416M) Assignment/Methods water-soaked silt overabundance pore weight

Slide 17

Assignment/Methods clastic barriers and joints (E. McBride) (E. McBride)

Slide 18

groove throws Assignment/Methods woodwind throws (416M) solemarks (416M) 416M

Slide 19

Assignment/Methods plot highlights in 4 rings show # of estimations show bi-directional patterns

Slide 20

Assignment/Methods 2) Honeycut Formation Checklist street cut close Max Starke Dam (E. McBride)

Slide 21

Assignment/Methods limestone versus Dolomite - Thin Section Dolomite - SEM (Soil Science Society of America) (Soil Science Society of America)

Slide 22

(Earth and Ocean Sciences at UBC) (Luis Garcia) Assignment/Methods stylolites versus stromatolites

Slide 23

(Compton, p. 183) Assignment/Methods flaw breccia versus arrangement breakdown breccia arrangement breakdown breccia – filled hollow shortcoming breccia – rehashed smashing/cementation

Slide 24

Assignment/Methods delicate residue disfigurement versus fragile twisting (Compton, p. 243) flaws break more safe layers just mottled surfaces in shear zone

Slide 25

Assignment/Methods teepee structure and geopetal structure Geopetal – Thin Section (Matt Campbell)

Slide 26

Field Trip #3: Paleozoic Rocks II Location Geology Assignment/Methods Reminders Text: Manual, p. 267-278; Compton, p. 166-171; 182-184; 242-243.

Slide 27

Reminders Brunton Rock Hammer HCl Acid Hand Lens Field Notebook Lab Manual Water Lunch Clipboard Colored Pencils Ruler & Protractor Extra Paper

Slide 28

Field Trip #3: Paleozoic Rocks II Cretaceous Stratigraphy of Central Texas

Slide 29

Cretaceous Stratigraphy of Central Texas Paleogeography and Sea Level Stratigraphy

Slide 30

Paleogeography and Sea Level Late Cretaceous Paleogeography http://www4.nau.edu/geography/master.html?http://www4.nau.edu/topography/

Slide 31

Cretaceous Stratigraphy of Central Texas Paleogeography and Sea Level Stratigraphy

Slide 32

(Manual, p. 272)

Slide 33

Stratigraphy (Duex and Lock, Univ. LA) generally level lying withdrawing ledge

Slide 34

Stratigraphy safe and non-safe limestone

Slide 35

(www.cretaceousfossils.com)

Slide 36

Stratigraphy hard (immaculate) and delicate (dirt rich) shallow subtidal and supratidal (www.cretaceousfossils.com) Hensell Sand Badlands sand, combination, paleosols earthbound environment Glen Rose Limestone Stairsteps

Slide 37

Stratigraphy Edwards Limestone "Swiss Cheese" unadulterated limestone and dolomite chert-rich Oyster-rich Del Rio Clay carbonaceous mud pyrite – anoxic tidal pond

Recommended
View more...