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31. The average duration of each cycle seems, on the basis of geological evidence, to be very roughly around 500 Ma.

32. He renounced his apprenticeship in 1858 and resolved to follow his eldest brother into the ranks of the Geological Survey.

33. The Outer Hebrides Thrust, and all the important faults mentioned above can be found in the geological map Fig. 7.

34. As befits its relatively young geological age, the specimen is preserved with its original shell material.

35. Where they scrape against one another, earthquakes, volcanoes, mountain belts and all manner of geological phenomena arise.

36. At first we thought it might be an outcrop of magnetic rock, but all the geological evidence was against it.

37. In consequence, amphibian fossils become very scarce indeed in later geological periods and there are long gaps in their fossil history.

37. Sentencedict.com try its best to collect and make good sentences.

38. Geophysical and geological interpretation, conceptual engineering design, reservoir simulation and environmental screening studies have been completed on the field.

39. Many have proved beneficial to areas such as medical diagnosis, geological prospecting and computer system configuration.

40. Where in their travels the plates slam and scrape against each other, we find geological unrest.

41. Started four years ago, the work has been delayed by bad weather and geological problems.

42. Over geological time it is likely that impacts have reduced the mass of the Martian atmosphere by a factor of one hundred.

43. In side rooms Beuys adopts the conventions of the geological or natural history museum rather than the gallery.

44. As early as the 1960s, major oil companies were combing geological data in the area.

45. This is largely because of its enormous potential for dating geological processes and sedimentary sequences.

46. The main geological evidence for a major ocean impact would lie in tsunami wave deposits.

47. A striking example of a creature isolated by geological change is the white-tailed, tassel-eared Kaibab squirrel.

48. The aim is to have 1:50 000 geological map sheets for the whole of Great Britain available to the public by 2005.

49. Moreover, some of these polymorphisms are astonishingly ancient; they have persisted for geological eons.

50. It all depends on whether you think in human terms or in geological terms.

51. It is a curious paradox that often the most spectacularly successful and numerous organisms are also those with a finite geological record.

52. How often do events of this sort, which leave no enduring geological record, happen on Earth?

53. Geological features ground out by ancient glaciers are seen overlaid by the scars of recent wind erosion.

54. The first is to look for geological records of ancient tsunamis in coastal areas throughout the world.

55. Consultancy work in engineering geology Engineering geological consultancy work continues to be carried out for clients in the private and public sectors.

56. On Earth, the deposit of sedimentary rock at the bottom of the ocean is part of larger geological cycles.

57. But the discovery of seismic activity suggests geological activity, which could provide large amounts of heat and minerals.

58. In consequence, thematic maps can be produced when required, as well as a more advanced three dimensional depiction of geological structure.

59. Each of these incremental shifts represents only a brief moment in geological time.

60. Geological maps have been digitised together with the lithology and stratigraphy derived from over 1250 boreholes and geophysical logs from over 70 boreholes.