#20

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Across
  1. 4. Saturated hydrocarbons with either straight or branched chains of carbon atoms e.g., phytane
  2. 7. Unconsolidated aquatic sedimentary deposit rich in lipid organic matter derived chiefly from phyto-plankton and putrefied under reducing conditions
  3. 8. Sand or man-made, sand-sized particles pumped into a formation during a hydraulic fracturing treatment to keep fractures open so that oil and natural gas can flow through the fractures to the wellbore
  4. 9. The conversion of a compound into another compound containing the same atoms in the molecule but arranged in a different way.
  5. 11. Elementary organic units of coal that can be distinguished under the microscope.
  6. 13. Cavities, voids or large pores in a rock that are commonly lined with mineral precipitates adj.
  7. 14. General name for sediments consisting of, or rich in, combustible native (organic) matter and its natural derivatives
Down
  1. 1. The process by which organic material in sediments is thermally altered by increasing temperature.
  2. 2. Organic material of land plant origin, especially that which is rich in lipid components
  3. 3. Decomposition of organic matter by heating in the absence of oxygen
  4. 5. Term applied to bacteria or other microorganisms that live and grow in the absence of molecular oxygen
  5. 6. Referring to all organic compounds characterised by open-chain structures
  6. 10. Treatment of a rock sample with hydrochloric acid, water and hydrofluoric acid to expose the organic material and its original texture
  7. 12. The residue obtained from the distillation of crude oil after all fractions, including lubricating oils, have been taken off.