GEY1112_L06_EnvironmentsDeposition_JElyWasinger

GEY1112 Name: Jay Ely-Wasinger Date: October 4 th , 2023 Class/section: GEY1112-C11 Instructor: Kristin Quadracci Lab Partner(s): Kenzie, Tesla, Ryder (emotional support) Lab 6 – Environments of Deposition Original, completed Lab Notebook pages for the following are included in this Lab submission: I. Pre-lab questions II. Experiment 1 III. Post-lab questions Environments of Deposition

Please note: for any questions that require additional research, consider using Google Scholar instead of Google. Also, any information taken/used from a source should be properly cited. PRE-LAB QUESTIONS 1. What does grain size, sorting, and rounding tell you about a depositional environment? 2. Imagine a climate change event transformed a sea into an arid, hot environment. What sort of deposits might you see in the resulting strata? 3. A bed is dark grey or black. What might this indicate about the composition of the parent material? Environments of Deposition

Table 2. Common Sedimentary Rocks Rock Type Particle Size Composition Comments Rock Name Clastic Very coarse–Coarse (> 2.0 mm) Any rock or mineral Rounded clasts; poorly- to well- sorted Conglomerate Clastic Very coarse–Coarse (> 2.0 mm) Any rock or mineral Angular clasts; poorly- to well- sorted Breccia Clastic Coarse–Medium (0.06—2.0 mm) Quartz, feldspars Feels sandy; some grains visible to the naked eye; poorly- to well-sorted Quartz Sandstone Clastic Fine (0.004—0.06 mm) Clays, quartz Feels gritty; some grains visible through a hand lens; well sorted Siltstone Clastic Very Fine (< 0.004 mm) Clays, quartz May be foliated; no visible grains; well-sorted Shale Chemical Varies Halite Tastes like salt; individual mineral crystals form three right angles Rock Salt Chemical Varies Gypsum Softer than fingernail; can be pink, white, or transparent Rock Gypsum Chemical Varies Dolomite Reacts in dilute acid only when powdered Dolostone Chemical or Biogenic Microcrystalline Quartz and/or quartz-based fossils Exhibits sharp edges and breaks like glass; smooth to the touch Chert Biogenic Varies Calcite and calcite-based fossils Small fossils or impressions are present; reacts with dilute acid Fossiliferous Limestone Biogenic Varies Carbon-based material Plant remains may be visible; black-brown color Bituminous Coal Environments of Deposition

Table 3: Sedimentary Rock Characteristics Sampl e Clast Shape Grain Size Sorting Color Rock Name E G H I J K Table 4: Environment of Deposition Characteristics Sample Rock Name Mineral Composition Near/Far from Source High/Low Energy of Deposition E G H I J K Environments of Deposition