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Sedimentary Rock Descriptions and Distractions Description vs Interpretation Rock Descriptions Unit Descriptions Distractions Text: Manual, p. 13-16, 77-90;

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Presentation on theme: "Sedimentary Rock Descriptions and Distractions Description vs Interpretation Rock Descriptions Unit Descriptions Distractions Text: Manual, p. 13-16, 77-90;"— Presentation transcript:

1 Sedimentary Rock Descriptions and Distractions Description vs Interpretation Rock Descriptions Unit Descriptions Distractions Text: Manual, p , 77-90; Compton, p

2 Rock Descriptions rock type stratigraphic name

3 Rock Descriptions stratigraphic name rock type color

4 (Luis Garcia)

5 Rock Descriptions stratigraphic name rock type color texture

6 Rock Descriptions Texture: 1. Grain Size 256-8boulder 64-6cobblegravel 4-2pebble 2-1granule_______ 10.0very coarse sand coarse sand medium sandsand fine sand very fine sand_______ coarse silt medium siltmud fine silt very fine silt   clay mm Phi (  ) Wentworth Size Class

7 angular grains well rounded grains Rock Descriptions Texture: 2. Grain Shape (Roundness)

8 Rock Descriptions Texture: 3. Sorting

9 (AGI, 1999) Rock Descriptions Texture: 4. Arrangement imbrication

10 energy/environment of deposition transport history Rock Descriptions Texture Interpretations

11 Rock Descriptions stratigraphic name rock type color texture grain composition

12 Rock Descriptions stratigraphic name rock type color texture grain composition porosity cements

13 grain porosity matrix cement (M. Campbell) Rock Descriptions

14 name rock type color texture grain composition porosity cements bedding

15 Rock Descriptions Bedding: Types Castile Formation, NM (Anderson et al., 1972) 10 cm laminations

16 Rock Descriptions Bedding: Types cross-bedding

17 Rock Descriptions Bedding: Types graded bedding (AGI, 1999)

18 Rock Descriptions Bedding: Thickness

19 Rock Descriptions Bedding: Contacts

20 Rock Descriptions stratigraphic name rock type color texture grain composition porosity cements bedding sedimentary structures

21 wave ripples Rock Descriptions Sedimentary Structures

22 Rock Descriptions burrows Sedimentary Structures

23 Rock Descriptions Sedimentary Structures mudcracks (AGI, 1999)

24 Rock Descriptions stratigraphic name rock type color texture grain composition porosity cements bedding sedimentary structures bioturbation

25 Rock Descriptions Bioturbation (E. McBride)

26 Rock Descriptions stratigraphic name rock type color texture grain composition porosity cements bedding sedimentary structures bioturbation fossils

27 Trace Fossils Rock Descriptions Fossils Body Fossils

28 Cretaceous fossils in central Texas Rock Descriptions Fossils

29 UT AUSTIN Interpretation

30 Rock Descriptions Additional Details for Sandstones: - FMCP:QFR - Clan Name

31 Rock Descriptions Sandstone Clan Names

32 Sedimentary Rock Descriptions and Distractions Description vs Interpretation Rock Descriptions Unit Descriptions Distractions Text: Manual, p , 77-90; Compton, p ,

33 Unit Descriptions stratigraphic name rock types brief rock descriptions - percentages - thicknesses - contacts - interbedding special features - soil and vegetation - topographic expression gradational sharp interbedding

34 Unit Descriptions bench slope cliff

35 Sedimentary Rock Descriptions and Distractions Description vs Interpretation Rock Descriptions Unit Descriptions Distractions Text: Manual, p , 77-90; Compton, p ,

36 Distractions Vegetation

37 (Luis Garcia) Distractions Algae

38 Distractions Lichen

39 Distractions Travertine

40 (E. McBride) Distractions Weathering

41 Distractions (E. McBride) Colluvium

42 Distractions Float (E. McBride)

43 Distractions Dynamite (E. McBride)


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