CTIVITY retation Name Complete parts SAMPLE A Course/Section ts 1 through 6 for
ID: 115157 • Letter: C
Question
CTIVITY retation Name Complete parts SAMPLE A Course/Section ts 1 through 6 for each sample below. Refer to FIGURES 62 and 3as meoded. Date:. 1. 2. Percent of each Wenrworth sire dan Grain sine range in mm m sand -gravel- 3. Graie sorting (cincle): 4. Grain soundnes (cirdlel 5. Sediment composition (dirde 6. Describe how and in what envisonmens (FIGURE 6.10) chis sodiment may have formed. Poor Moderate el SubroundWell-tounded Blochemicall Chemical Well Angular Detrical (Siliciclastic) (Bioclastic) SAMPLE B 1. Grain size range in mm: 2. Percent of each Wenrworth sine clas mrn dlay grave 3. Grain sorting (ciecle): 4. Geain roundeess (clecle): 5. Sediment composition (circle) 6. Describe how and in what environment (FIGURE 6.10) chis sediment may have Sormed Poor Moderatc Well Well-sounded Deurical (Siliciclastic) Biochemical (Bloclastic) SAMPLE C 10 mm 1. Grain sinc range in mm 2. Percent of each Wentworth size cla sandgavel day 3. Grain sorting (circlel 4. Grain roundness (cirdel 5. Sediment composition (cincle): Well Poor Subround Well-rounded Angular Detrical (Silicidlastic) Biochemical Chemical Bioclastic) 6. Describe how and in what cavironment (FIGURE 6.10) this sediment may have formed REFLECT & DISCUSS Imagine that these sodimens are rocks. Which of the samples do you think would be the lean diagnostic of a specific ancient environmene Why 178Explanation / Answer
Sample A: Clay - 0.98–3.9 µm
Silt - 3.9–62.5 µm
Sand(coarse to very fine) - 0.5 mm to 125mm
Gravel (Very coarse to very fine) - 32 mm to 4 mm
3. Grain sorting : Poor - Grains with a wide range of sizes( e.g. in storm beds or from flows/mudflows.)
Well sorted - Grains all the same size(e.g. Sand deposits on beaches, in shallow seas or in deserts)
4. Sub - rounded
5. Detrital
6. Sedimentary successions form by particles which are transporting to riverbeds, lakes, or oceans.
Sample B: Grain size - 1 -2mm
Very coarse sand
Poorly sorted
Angular
Detrital
Sample C: Medium gravel
Moderate sorting
Angular
Detrital