Lab 7 Kassandra Segura

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Blinn College *

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1403

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Geology

Date

Dec 6, 2023

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8

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Problems 2. Complete the block diagram of the fault. A. Finish numbering the layers on the right side of the fault. B Label the hanging wall and footwall. C. Draw half arrows on the cross-section to show the movement of the fault blocks. D. What type of fault is this? == Normal (Reverse 3. Complete the block diagram of the fault. A Finish numbering the layers on the left side of the fault. B Label the hanging wall and footwall. €. Draw half arrows on the cross-section to show the movement of the fault blocks. D. What type of fault is this? Normal) Reverse 4. The following diagram is a map view of a fault (you S are looking down on the surface at a road broken by the fault). A. Draw half arrows on each side of the fault showing the direction of movement for that block. B. What type of fault is this? right-lateral strike-slip left-lateral strike-slip Refer to block model #9. What type of fault s this? {1 MAP VIEW
e e e 6. Identify the type of fault shown in each block diagram below: normal fault, reverse fault, right-lateral strike-slip fault, or left lateral strike-slip fault Label the hanging wall and footwall on the normal and reverse faults. D V(’i\//", ( '.1 ‘/l))) H "' \ (/\(\{1/\ O ‘1 (A 62 Geologic Structures and Maps D
Problems 7. Identify the type of fold shown by each block model. [ | , i Model 3 [ Model 4 Ci r Model 5 Model 6 P LA Model 7 Model 8 8. A. Number the rock layers on the geologic map surface of the block diagram below. B. What type of fold is shown in the block diagram? U { C. Place strike and dip symbols on the upper surface of rc;ck layer 2. (Use layer 3 as an example). I 77 3 9. A. Number the rock layers on the geologic map surface of the block diagram below. fiwnk 7 B. What type of fold is shown in the block diagram? Y CAne C. Place strike and dip symbols on the upper surface of rock layer 2. (Use layer 3 as an example). 3/82 1 2. X3 64 Geologic Structures and Maps N)
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14. What type of structure is shown on this geologic map? 7 Jiade s younger rock MAP VIEW 15. A. Do strike and dip symbols on this geologic map show the rock layers dipping toward or away from the center of iy this structure? toward a@mm\ B. What type of structure is this? o ( P C. Which rock is younger? A) B \ 3 = MAP VIEW 16. A. What type of structure is shown on this geologic map? S U\ > B. Which rockisolder? (A ) B MAP VIEW 66 Geologic Structures and Maps SRR e PR T
é GEOLOGIC MAP SYMBOLS 35 D > « > »‘. - f » 3 7 strike and dip fault syncline anticline plunging syncline plunging anticline 17. A. Identify the structure in the 18. A. Identify the structure in the geologic map below. geologic map below. | | B. Draw strike and dip symboles on the rock B. Draw the correct geologic map symbol on ? layers labeled A. the center of this fold. g C. Draw strike and dip symbols on the younger rock layers. —b|e— A A B |2 3e|28(3¢° g MAP VIEW - MAP VIEW 19. A. Draw half arrows on the cross-sectionto 20. A. Identify the structure below. show the movement of the fault blocks. D\ UNO (hint: D means down, U means up) »L B. Draw the cross-section view on the front. B. What type of fault is this? Ve Ve & C ¢ )| 21. This geologic map shows tilted layers. What direction are the layers dipping? 7 5 NOvT) i<t X N g X T X MAP VIEW Geologic Structures and Map: 67
Geologic Maps Ona 9‘9°l°9i: map each rock unit at the Earth's surface is represented by a color, letters and ;imetlmes a pattern. The first letter(s), which are capitalized, indicate the geologic age of the rock. e following lower case letter(s) reference the name of the rock unit. The explanation or key is shown as a column of the rock units listed in order of increasing age. The youngest rock unit is at the top of the column; the oldest rock unit is on the bottom. The basic rock nit geologists use, called a Formation is defined as a mappable unit of rock. Formations can be combined into a larger rock unit called a Group and divided into smaller rock units called Members. All of these designations can be used on a geologic map. The map shown below uses formations only. The line separating rock units is called a contact line. EXPLANATION AGE UNIT TRIMMERS ROCK; FORMATION Dtr HARREL FORMATION Dh MAHANTANGO FORMATION Dmh MARCELLUS FORMATION Dmr ONONDAGA FORMATION Don Dmh OLD PORT . FORMATION | ™\ / Do Dmr Dmr LOWER DEVONIAN‘ MIDDLE DEVONIAN |UPPER DEVONIAN | Do ~~.Don Bedrock Geologic Map of Montgomery, Pennsylvania jic Structures and Maps 68
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Questions Refer to the Bedrock Geologic Map of Montgomery, Pennsylvania 27. 28. What is the name of the oldest rock formation? Nhat is the name of the youngest rock formation? \IJ; 1 e During what geologic period (age) did these rock formations form? | X_ VO . What geologic structure is shown on this map? ] || A Y 6. Below the surface, do the rock layers dip toward or away from the center of the fold? foward away from Draw a strike and dip symbol on the Mahantango Formation (Dmh) Draw the correct geologic map symbol on the center of this fold.
Use the color Geology of Texas Map provided in class to answer the following questions. 29. 30. 31. 32, 33, 34. 35. 36. 37. 38. 39, 40. 41. At which of the following locations would you find the youngest rock? Amarillo Midland @ Dallas What letters are used to represent the oldest rock? 7‘/ What is the geologic age of this rock? Pre’cambriaT\\ Paleozoic Mesozoic Cenozoic Which of the following is a possible absolute age for this rock? 40 my 265 m.y. 450 m.y. T5m> Dinosaurs lived during the Mesozoic Era. Which location could have dinosaur fossils in rocks at the Earth’s surface? Houston Midland (@ Corpus Christi Observe the shape of the youngest units on the map (Qal). What is currently depositing sediment at these locations? e C /‘/—\, !f,"h A c ANV Bryan is located on the Yegua Formation. During which geologic epoch did this form? Pliocene Miocene Oligocene ’flr:e ) = What is the age range of this geologic period? What letters represent the Yegua Formation? What is the name of the Group to the east of the Yegua Formation? ':_,H’! NC LY Is this Group older or younger than the Yegua Formation? Older @j GRS Do rocks become older or younger if you continue to the east? Older /’Younger) If #1 is the older rock, which diagram could represent the subsurface geology of this eastern portion of Texas? A (B ) WEST EAST WEST EAST AR