According to the archeological study the temple is about 1000-1200 years old.

The archeological study began in 1997 and lasted until 2006.

The first careful archeological study was conducted in 1972, and several others followed.

The refusal was given due to the lack of "a full archeological study".

Archeological studies have found evidence of use going back two thousand years, to Moche culture.

The tribe has sponsored several archeological studies on the reservation.

More thorough explorations and archeological studies began in the 1980s.

Archeological studies, some dating back to the 19th century, have provided more accurate, if incomplete, information.

Once the engineering and archeological studies are completed later this year, the advisory committee will hold a series of public meetings.

During the 1980s the townsite was cleared in order to facilitate archeological studies.