At Site B7/8-1, our improvised plastic coverings held up, and we were able to extract the last of the bones from the second lift without any problems. We decided to take the excavation down one more spit (the ninth at this site) in order to ensure that we had indeed unearthed all artifacts and fossils. Pretty quickly after beginning work on this spit, we uncovered another bone; what appears to be another of the ribs. However, the rib appears isolated, and we haven't hit many stone tools as yet in this layer, so we think that this spit may be the last one for this site. We will need to bring the transit team back out for a final lift of the last few stone tools and this rib at a later time.
The
rain didn't have much effect on the hardness of the sediments, but it did
reduce the dust covering the slopes of the basin, and, therefore, the fossils
and tools on those slopes. We sent a survey team out to the "Lava Peninsula,"
a ridge of basaltic rocks that stretches to the north of our Locality C. Lava
Peninsula is an interesting part of the Olorgesailie story. Previous researchers
considered it an important landscape feature of the basin, and thus to the
early humans who inhabited the basin. However, our research has shown that
the majority of Lava Peninsula was actually covered by sediments by the end
of Member 1 times (~990,000 years ago) and therefore could not have been a
factor after that. It is only in recent times that it has been lifted by faults
and uncovered by erosion.
Several
years ago, we noticed by chance in the brush on top of Lava Peninsula that
there were tools and clusters of fossils coming out of pockets of sediment
trapped between the boulders that make up the peninsula. Our survey concentrated
on searching for newly eroded pockets of fossil from around the old excavation
pits. We found a lot of fossil material on the surface, along with stone flakes
and several good examples of handaxes. In a couple of areas, we found concentrations
of stone flakes which could possibly represent a single visit by early humans
where they fashioned stone tools at the site. It is likely that the toolmakers
from Site 15 (the Elephant Site) also visited Lava Peninsula, since today's
discoveries between the boulders were in the same soil that can be traced
between the two sites.
-RP