Complex sentence: The natural materials of the region were indicative of the style: wood (in particular Douglas fir and red cedar), stone, plywood, wood-stud and post and beam construction with exposed roof decking underside of roofs at ceilings and eaves.
Split into simpler sentences: The natural materials of the region were indicative of the style. Wood (in particular Douglas fir and red cedar), stone, plywood, wood-stud and post and beam construction with exposed roof decking underside of roofs at ceilings and eaves.