31. The Quaternary Period began about and continues today. 32. It has been created due to faulting and formed in volcanic soil during the Quaternary period . 33. Sand dunes were much more widespread and active in many areas during the early Quaternary period . 34. Until 1920, 34 wells have been drilled to draw Quaternary period stored water from the ground. 35. Thus bay muds are important time records of glacial activity and streamflow throughout the Quaternary period . 36. She studied pollen deposits during the Quaternary period . 37. The more recent marine invertebrates of Washington from the Quaternary period were generally adapted to cold climates. 38. During the Quaternary period , the last 2 million years, the area has experienced a sequence of glaciations. 39. Glaciation during the present Quaternary Period has left widespread estuarine alluvium, peat and blown sand are abundant. 40. The cliffs overlooking Steamer Lane are composed of Quaternary period marine deposits, part of the Purisima formation.
