Ireland Field Lab 2

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Across
  1. 2. Hard glassy mineral (SiO2) with conchoidal fracture and no cleavage
  2. 6. Opaque white quartz variety common in veins (two words no space)
  3. 7. Gas-bubble cavity preserved in a volcanic rock
  4. 8. Tectonic regime in which the crust is stretched and thinned
  5. 10. ___ Group: Silurian volcanic-sedimentary succession of west Dingle
  6. 13. an anhydrous carbonate mineral composed of calcium magnesium carbonate
  7. 15. Coarse rock made of angular broken rock fragments cemented together
  8. 16. Parallel scratches gouged into bedrock by rock fragments embedded in moving ice
  9. 18. Angle a fold axis or linear feature dips below the horizontal
  10. 21. Ancient southern supercontinent that rifted apart to form several present-day continents
  11. 22. Adjective describing landforms deposits or processes associated with ice sheets and glaciers
  12. 25. Mixing and disturbance of soil or sediment caused by repeated freeze-thaw cycles
  13. 27. Fault along which blocks slide horizontally past each other parallel to the fault trace (no space)
  14. 28. Tectonic process in which two continental plates converge and weld together
  15. 32. Ridge of glacially deposited debris marking the former edge of an ice mass
  16. 33. Stratigraphic unit made of two or more formations
  17. 35. Extinct marine arthropod with a three-part exoskeleton an index fossil of the Paleozoic
  18. 36. Rock formed from compacted volcanic ash
  19. 37. Polygonal cracks formed as drying mud shrinks (two words no space)
  20. 38. Bowl-shaped hollow on a mountainside carved by glacial erosion also called a cirque
  21. 43. Mount ___: the highest peak on the Dingle Peninsula
  22. 44. Direction of ancient flow reconstructed from cross-bedding or imbrication
  23. 46. Criteria used to determine the original top of a tilted bed (no space)
  24. 48. Mass-movement failure involving rotational sliding of a coherent block of rock or sediment
  25. 51. Term for a sediment whose grains are all of similar size (two words no space)
  26. 54. Ancient ocean whose closure triggered the Caledonian Orogeny
  27. 55. a widely distributed trace fossil characterized by intricate root-like structure
  28. 56. Term for magma or rock rich in magnesium and iron, low in silica
  29. 57. Area of older rock surrounded by and exposed within younger surrounding rock
  30. 58. ___ Formation: Silurian unit of the Dunquin Group examined at its boundary with the Mill Cove Formation
  31. 60. Cone-shaped sediment deposit at the foot of a mountain front (two words no space)
  32. 62. Flattened lens-shaped pumice fragment within a welded tuff
  33. 63. Vent releasing volcanic gas and steam without erupting molten rock
  34. 64. Adjective describing river-channel deposits and processes
  35. 65. Upward-injected tongue of mud into overlying sand a way-up indicator (two words no space)
Down
  1. 1. Green primary mineral common in basalt first to weather away
  2. 3. Concentric ash pellets formed in a wet eruption column (two words no space)
  3. 4. Marine shelled fossils signalling shallow seas between volcanic eruptions
  4. 5. Preferred upstream-dipping orientation of disc-shaped clasts in a flow
  5. 9. Boundary surface between two distinct rock units
  6. 11. Rapid mass flow of poorly sorted water-saturated sediment (two words no space)
  7. 12. Mountain-building event produced by collision or convergence of tectonic plates
  8. 14. Period just before the Devonian; age of the Dunquin Group rocks
  9. 17. Crystal size shape and arrangement in an igneous rock reflecting its cooling history (two words no space)
  10. 19. Individual fragment of pre-existing rock within a sedimentary deposit
  11. 20. Acronym for a vast outpouring of mainly basaltic magma over a short geological interval
  12. 23. Large early-formed crystal set within a finer-grained igneous matrix
  13. 24. Network of shallow interconnected channels separated by mid-channel bars (two words no space)
  14. 26. Inclined layers within a bed used to read palaeocurrent direction (no space)
  15. 29. Mud fragments torn up and entombed in an overlying bed (three words no space)
  16. 30. Ancient continent forming the northern landmass before Iapetus closed
  17. 31. Hard fine-grained sedimentary rock composed of microcrystalline silica
  18. 32. Fine-grained material surrounding larger clasts in a sedimentary rock
  19. 34. Basic mappable rock unit with distinct traceable characteristics
  20. 39. Yellowish-green mineral formed by alteration of mafic igneous rock
  21. 40. High-grade metamorphic rock with banded mineral layering
  22. 41. Fossilised evidence of organism activity rather than body parts (two words no space)
  23. 42. Tuff with flattened squashed pumice fragments forming streaky layers (two words no space)
  24. 45. Partial melting of crustal rock that generates new felsic magma
  25. 47. Term for magma or rock rich in silica, feldspar, and quartz
  26. 49. Fragment of host rock enclosed within an igneous intrusion
  27. 50. Coarse-grained felsic intrusive igneous rock
  28. 52. physical and chemical changes/processes that affect sedimentary materials after deposition
  29. 53. Geologic period (~419-359 Ma) when most of Dingle's red rocks were deposited
  30. 59. Iron oxide mineral responsible for the red colour of the Old Red Sandstone
  31. 61. Vesicle infilled with a secondary mineral such as quartz or calcite