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the site during the 17th-century occup.tion.<br />
Sampling<br />
The 17th-century occupation deposit at Ren- was a<br />
distinctive gray black mottled organic sand containing numerous<br />
artifacts. It was largely confined to the interior <strong>of</strong> the house and<br />
the area imdiately in front <strong>of</strong> the doorday. A pollen sample from<br />
the surface <strong>of</strong> the cobble floor rnside the house (pal) and<br />
cornparafive samples fronthe 1660-1680 occupation stratum above the<br />
floor (po3), the ro<strong>of</strong> collapse debris inslde the house above the<br />
floor (pr21, and the Ilth-century occvpation dcposlts just outside<br />
the doorway (prl) were selected for analysis (Table 1).<br />
Labordtoey methods and Data Presentation.<br />
pollen extraction follouedMehringer (19671. and residuesrerc<br />
mounted in glycerol. The pollen was identified at llor with<br />
problematical grains enmined under oil imecsion at LOOOX. Four<br />
hundred pollen grains vere tabulated for each sample. Pollen<br />
concentrations per gram <strong>of</strong> sample vere computed, following<br />
Benningh<strong>of</strong>f's (1962) exotic pollen addition method, to permit<br />
recognition <strong>of</strong> site formation processes (Figure 3 ).<br />
pollen spectra calsularsd fmm two different sums are<br />
presented in the poilsn diagram (Figure 3). The open line b an in<br />
the diagram are percentages computed from separate sum tor<br />
arboreal and non-arborsal pollen types. This separation helps to<br />
differentiate regional (tree-dominated) and local (herb-dominated)<br />
pollen types to some extent, and it reducer the stariatical<br />
dlstort~ons that the contributions <strong>of</strong> pollen types reflecting<br />
different phenomena induce in each other. It has the disadvantage<br />
<strong>of</strong> producing possibly misleadingly high percentages in some<br />
rnnranseo from small counts among the minor types. The solid<br />
colored portion <strong>of</strong> the diagrams registers relative frequencies<br />
based on the identifiable pollen <strong>of</strong> all types.<br />
!<br />
pollen concentration figures were not computed for individual<br />
taxa, <strong>be</strong>cause these would not <strong>be</strong> meaningful in the absence <strong>of</strong><br />
chronolog~cal control over sedimentation rate and night <strong>be</strong> mistaken<br />
for pollen influx data.<br />
RIA pollen grains roo corroded to <strong>be</strong> identified were tabulated<br />
to provide the pollen degradation element <strong>of</strong> the site fomtioa i<br />
process record (~igure 1). unidentifiable pollen grains were<br />
included in the concentratLon figures but were not incowrated in<br />
any am from which the frequencies <strong>of</strong> other types vere computed.<br />
=he terns "corrodedm#. "degraded," and "deteriorated" are usad<br />
interchangeably, in the generic sense, to refer to cumulatitlve postdeporltion<br />
damage <strong>of</strong> any kind other than tearing, rather than in<br />
reference to specific kinds <strong>of</strong> damage as employed by Cushimg (19641<br />
and Havinga (1967, l98l).<br />
The most common English names applied to plants are employed<br />
in the text and diagrams. The Latin name <strong>of</strong> each taxon is given in<br />
I<br />
I