41. In the Atacama Desert high mountains ( > 5000 ) have remained ice-free through the whole Quaternary period . 42. The island's submarine activity occurred during the Miocene epoch, producing basaltic eruptions that persisted to the Quaternary period . 43. The islands have been shaped by numerous glaciations during the Quaternary Period , the most recent being the Devensian. 44. The theory is based on significant climatic changes occurring in and around the equator during the Quaternary period . 45. The rocks from the southern portion of the watershed are newer, dating from the Tertiary and Quaternary Periods . 46. The caves of the " Balzi Rossi " have proved rich in palaeolithic remains of the Quaternary period . 47. The cinder cone was formed during the Quaternary Period , and is cut by recent movement on the Toroweap Fault. 48. The landscapes of Earth during the Quaternary period were filmed in Gran Canaria and Fuerteventura ( Canary Islands ). 49. Some continental movement took place, the most significant event being the connection of glaciations in the Quaternary Period that follows. 50. This alternation highlights repeated changes in the dominant fluvial or wind patterns in the valleys of Tibesti during the Quaternary Period .
