Raina Savitsky
June 27, 2003
Excavator L8
Rancho del Rio
Subop 150ZE, 150ZD
Final Report

Upon joining operation 150 I began working with excavator L3 at sub-operation ZE. Excavator L3 and his worker began work approximately one week before I joined the project, digging along the base of the mound in an east-west line. They were trying to expose a wall of the structure. L3 and his worker continued to achieve that goal while I began work on the southeastern corner of sub-operation ZE at lot 150ZE/005 (28mE, 12mN of site axis datum). My goal was to find the floor level of the structure.

The lots located at 28E, 12N were excavated to 80cm BGS. The stratigraphy of the pit was significant. We discovered that 30cm BGS was the courtyard floor. This information was also supported by sub-operation ZH. 30-50cm BGS yielded many sherds, chert, and 50-80 yielded much black obsidian. With this information we decided to follow the courtyard level and expose more of the courtyard. We dug a trench southward toward the center of the courtyard. We found some large rocks in the trench and suspect that they could be related to another structure, possibly some sort of cooking pit since we found a few small pieces of bone as well. Hopefully the artifacts that we found in the trench will tell us more about the activities in the courtyard and the relationship between the courtyard and the structures surrounding it.

At this point in time I was reassigned to sub-operation ZD which excavator L9 had been previously working on. Sub-operation ZD is a small mound located in between sub-ops ZA and ZH. L9 opened up lots on the eastern face of the mound hoping to find the exterior walls of the structure. L9 and his workers found an abundant amount of tumble located as much as 4 meters from the eastern edge of the mound. There was also a possible wall and possible post holes. Because of the numerous amount of tumble nothing could be proven and a more extensive look at these possible structures was needed.

I began to back track through the lots running south-north along the eastern edge of the structure. They were excavated to 40 cm BGS and many of the unnecessary larger rocks were removed. After completing this we had a better possibility for a wall located 17E, 5N and 17E, 6N of the site axis datum. There were two large rocks that were nicely shaped and nicely aligned. However their alignment was at a southwestern angle to the mound. To further expose these rocks the lots were excavated to 90cm BGS (sterile). After the excavation we found that there were rocks placed further back in the wall, underneath the two larger rocks. With this, we had sufficient information to call the rocks a wall. It was named TORTUGA and was discovered on June 12, 2003.

It was also thought that TORTUGA could have extended to the northern edge of lot 17E, 6N, where there were more large rocks. We dug underneath these rocks and found only earth. Since we found a wall of sub-operation ZD we decided to clean up some of the tumble and open up more of the courtyard. L7, working on sub-operation ZA, had the same objective at this point. Working side by side we connected our two sub-operations and opened up a large portion of the courtyard. Each lot in this section was taken down to 30cm BGS, the courtyard floor level that I found in sub-operation ZE.

After we cleaned up the area we found that there was a large amount of tumble that extended 5-6 meters away from the mound in sub-op ZD. This was clearly not just tumble. Due to the rock patterns in the open area, we suspect that there was once a small exterior divider wall. We also found a lot of bajareque to support our idea of a possible wall structure. This wall was most likely was only a few stones high and about three meters long. It was probably added onto the structure much later and acted as a wall to create different rooms and areas for different activities. Judging by the architecture of this exterior structure it is suspected to be post-classic. Besides bajareque, we found many sherds, a candelero, ocarina, black obsidian, and chert.

Next year it would be best to follow the slanted TORTUGA wall southwest into the actual structure to ensure its orientation. It would also be of interest to continue to open up the courtyard. By doing this we could see the boundaries of the exterior extension divider and if other structures had similar structures. In other sub-operations sufficient information was gathered from the artifacts to prove that there was ceramic production in the site. By opening up the courtyard and adjoining more sub-operations we could continue to investigate this production.