Lab 6 - Cretaceous Field Trip Questions

Lab 6 - Cretaceous Field Trip Questions - NAME _CRETACEOUS...

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NAME _______________________________________________CRETACEOUS FIELD TRIP STOP #1 - Overview of the Fredericksburg Group. This is a view of the topographic features east of the intersection of Highways 67 and 2481 on Hwy 67. A. Geologic Map Questions: 1. Refer to the Cross Section E-E 1 . As we move eastward from Erath through Somervell and Hood Counties, does the Cretaceous-age rocks get older or younger? 2. According to the geologic cross section, in which geologic basin are we situated? 3. According to the Physiographic Map, in which physiographic province is the Chalk Mountain area? 4. Are the Cretaceous-age rocks in the Dallas , Waco and Austin areas older or younger than those around Stephenville? 5. What is the strike direction of the Cretaceous formations around the Glen Rose area? 6. What is the dip direction of the Cretaceous formations around the Glen Rose area? B. Field Trip Questions: 1. What hypothesis can be formulated to explain the presence of the particular topographic features characteristic of this area (formation of flat-topped hills, slopes, farmlands and valleys)? 2. What are the topographic and vegetative characteristics of the a. Walnut Formation b. Comanche Peak Formation c. Edwards Formation
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3. What features could be used to make a geologic map of this area similar to those of the Geologic Atlas of Texas? Keep in mind that geologic maps are generally based on high-altitude aerial photographs. STOP #2 - This locality is situated in the Paluxy and Walnut Formations 1.6 miles west of the intersection of Highway 220 on Hwy. 67. Geologic Highway Map Questions: 1. To which group does the Paluxy Formation belong? 2. To which group does the Walnut Formation belong? 3. In West Texas and the Big Bend region, what formations are approximately equivalent in age to the Paluxy and Walnut Formations? Geology Questions:
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This note was uploaded on 01/16/2012 for the course GEOL 106 taught by Professor Dr.phillipmurphy during the Fall '10 term at Tarleton.

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Lab 6 - Cretaceous Field Trip Questions - NAME _CRETACEOUS...

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