The Sego Lily

An archeological dig has a boundary dispute with the Goshute Indian nation over reservation lands in Utah. Doctor Henry wants and even demands to dig on Indian lands. He does not want to believe the survey markers the government has. He is forced to pay for another survey which only confirms the original markers. This makes him even madder and is vengeful over the matter and will not forget they wronged him. He always takes credit for all the noteworthy finds even when he is not there. He is not welcome on the reservation land at any time.
Doc Henry’s former students are looking to get out from under his heel, but he controls all the money in the region. Al and Harry (former students of Doctor Henry) finds a new dig site on reservation land along with a current native student Running Dog. Running Dog petitions the Goshute tribe that he and his colleges be given permission to dig on tribal lands.
Doctor Henry, when finding out about the new dig, demands he should have control of the dig because he is the best and deserves it. The tribe tells him to stay away.
The tribe allows the dig on their land to proceed after several ceremonies are conducted with Al and Harry. Running Dog and the tribal Elders later join in.
The archeological site is ancient and may reach back to 20,000 BC or beyond. It may tell of the many people on the land, the filling of the giant lake, its draining, and the cold they continually fought to survive.
In a cave they find records of the ancient people all etched on a polished granite Wall 12 feet tall and many steps wide. They doubt even today they could etch the Wall. The Wall reports the past and if read properly, future events? The finders doubt this, but the ancients appear to have predicted accurately some future events in the heavens or did they just record them. But then the question is how did they know of them? The dig team has many unusual findings of the knowledge about these ancient people, but they fear to release the information.
Just where will this lead the Goshute Nation, the dig team, and Doctor Henry?
Is it possible to build a calendar to track time and not use the moon or sun?