Central Belize

The Central Belize Archaeological Survey (CBAS) was initiated in 2005 as a sub-project of the Belize Valley Archaeological Reconnaissance project (BVAR; directed by Jaime Awe) to investigate the prehistoric Maya cemetery site of Caves Branch Rockshelter. Subsequently, we began to survey other nearby cave and rockshelter sites (Hardy Reference Hardy2009) and to excavate the monumental civic-ceremonial centre of Deep Valley (Jordan Reference Jordan2008). CBAS became an independent project in 2009, with an increasing focus on sites in the neighbouring Roaring Creek Valley (Figure 1). This slight geographic shift was in part intended to expand bioarchaeological investigations to include dark zone cave contexts identified during the late 1990s by BVAR's Western Belize Regional Cave Project. In the area around these caves, we identified two large, previously unreported civic-ceremonial centres and a network of raised roads (sacbeob) connecting them and other sites. Our survey and excavations at Tipan Chen Uitz (Figure 2) have yielded evidence that it was a regional capital with ties to powerful foreign polities, as attested by the discovery of multiple carved stone monuments (Figure 3; see Andres et al. Reference Andres, Helmke, Morton, Wrobel and González2014; Helmke & Andres Reference Helmke and Andres2015; Andres et al. in press in Antiquity). We have also continued our investigations of mortuary rockshelters, including Sapodilla Rockshelter in the Caves Branch Valley.

Figure 1. Map of Central Belize. The Central Belize Archaeological Survey research area includes sites located around the Roaring Creek and Caves Branch Rivers, but not those in the northern and western areas of the map.

Figure 2. Plan of Tipan Chen Uitz.

Figure 3. Tipan Chen Uitz monument 3 (photograph by S. Morton).

Our work has demonstrated the importance of including archaeological data from caves and rockshelters in regional historical reconstructions. Specifically, excavations of monumental architecture by CBAS and others at the centres of surface sites and surrounding settlements have identified very few ceramics dating to before the Middle Classic period (c. AD 550). Late Preclassic and Early Classic sherds, however, are ubiquitous in rockshelters and in many caves, especially around their entrances. These provide evidence of a sizeable early rural population who, thus far, have remained otherwise archaeologically invisible. While the use of these sites is thought to be largely ritualistic in nature, artefacts deposited in caves and rockshelters by members of local communities also provide data that are useful in studying aspects of social, economic and political organisation (Morton et al. Reference Morton, Isa and Wrobel2015).

Mortuary deposits

Mortuary deposits have provided some of the most interesting insights into the nature of social organisation in the region. While individual sites all have unique use-histories, varying widely in the number of individuals (from just a few to well over 100), in patterns of intentional and unintentional secondary movement of bones, and in the timing and intensity of use, caves and rockshelters demonstrate several important and broadly consistent differences. Rockshelters, located beneath natural overhangs along rock faces, are easily accessible and visible with natural light. Accordingly, their usage appears rather unrestricted. Our two largest rockshelters, both in the more rural Caves Branch River Valley, show age and sex distributions that appear to conform to expected mortality profiles, and individuals were treated simply—placed in small pits with few or no grave goods (Figure 4). For the most part, secondary movement of bones appears unintentional, resulting from disturbance while digging newer graves. This general pattern of burial in rockshelters began in Central Belize by the Late Preclassic period (300 BC–AD 300), presumably coinciding with the local establishment of small agricultural communities, and continued until the area's depopulation, probably during the eighth or ninth centuries AD. Within the Roaring Creek Valley, however, mortuary use of the cave site at Actun Uayazba Kab ceases around the time that the surrounding area was being urbanised, after which the site was probably used for rain-related rituals (Wrobel et al. Reference Wrobel, Freiwald, Michael, Helmke, Awe, Kennett, Gibbs, Ferguson and Griffth2017).

Figure 4. Simple pit burial of an infant from Sapodilla Rockshelter (photograph by G. Wrobel).

Thus far, associated ceramics and direct AMS dates indicate that the mortuary use of dark-zone caves was later, coinciding with the period of local urbanisation, or, perhaps, with Late Classic period droughts thought to have, in part, led to the collapse of city-states in the Central Lowlands. Mortuary contexts in caves are more restrictive—they are typically located within the deepest chambers, and are thus often difficult to reach and required artificial light from pine torches. While cave burials seem to demonstrate equal numbers of males and females, it is clear that age guided inclusion. Specifically, it is rare to find infants under the age of three, or middle-aged and older adults. The meaning of this restriction is debated. Some have pointed to parallels with ethnohistoric accounts from the colonial Yucatan of sacrificial rituals associated with rain ceremonies, in which young individuals—usually children around the age of five to seven years—were killed and deposited in cenotes. Our analyses of age distributions in the caves, however, do not show obvious over-representation of that specific age range relative to adolescents and young adults. We also find evidence that individuals in caves often underwent complex and prolonged mortuary treatments that are consistent with documented elite funerary programmes (Wrobel et al. Reference Wrobel, Helmke, Freiwald and Wrobel2014). Thus, we believe that the use of cave chambers was, at least in some cases, analogous to that of tombs (Figure 5), and therefore served to house a sub-group that was socially distinct from the rural farmers placed in rockshelters.

Figure 5. The ossuary from chamber 3 within the cave site of Je'reftheel (photograph by C. Helmke).

Although comparisons of dental micro- and macroscopic indicators (Wilson bands, linear enamel hypoplasia, caries) demonstrate relatively good health among all burial groups (Michael Reference Michael2016), comparisons of cranial and dental modification prevalence have found that individuals from caves had relatively high frequencies of both modifications, while modifications were almost completely absent within rockshelters (Figure 6). In this way, individuals distinguished in death by their placement in caves were also marked as distinct in life from those who would be buried in rockshelters. Future investigations of these contexts will continue to document indicators of social identity, with the goal of linking mortuary ritual to broader social and political developments in Central Belize.

Figure 6. a) An unmodified cranium from Sapodilla Rockshelter; b) a cranium with tabular erect modification and a post-coronal sulcus from Actun Kabul, a dark-zone cave (photographs by G. Wrobel).