There are such distinct changes between Georgetown and San Francisco times, particularly as regards architecture, that an intervening period has been postulated. Excavations in Arizona are thought to provide evidence to substantiate this belief, but there are as yet no published accounts. It has also been suggested that the marked changes were due to outside influences, possibly both Anasazi and Hohokam. Still another theory advanced to account for the architectural changes at the beginning of the San Francisco stage is that the culture was modified by the addition of a Colonial Hohokam house type.[99] It is generally agreed that after about 700 or 800 A.D. the Mogollon was a highly mixed culture, but there are many questions which cannot be answered until more evidence is available. Whatever the explanation, many culture traits, notably house types, did change. [Illustration: Fig. 55—Postulated reconstructions of the dwelling units of the three Mogollon phases represented by the houses in the Harris Village. (After Haury.[50] Courtesy Gila Pueblo.) a. Georgetown.] [Illustration: b. San Francisco.] [Illustration: c. Three Circle.] The small, roughly circular houses were replaced by deep rectangular pit houses with roofs supported by a main center pole and auxiliary poles along the long axis. Most had side entrances, but in some cases the entrance was through the roof. Some of the wood taken from these houses has yielded tree-ring dates. At Mogollon Village four houses, believed to have been occupied at the close of the period, contained datable logs. The dates fell between 896 and 908 A.D. At Starkweather Ruin, a house attributed to the San Francisco phase yielded two logs with dates of 927 A.D. In addition to the domiciliary structures, there were larger houses thought to have been of a ceremonial nature. These were kidney-shaped as a result of the drawing in of the sides at the entrance. They did not have ventilators. Storage pits were rare in houses but occurred frequently between the structures. They were usually undercut, so that they were wider at the bottom than at the top. The same pottery types found in the Georgetown phase continued to be made and red-on-brown and red-on-white painted wares were also produced. Textured pottery increased in importance and included banded, punched, and scored forms.