First Colony Foundation Using Archaeology and Historical Research to Find Sir Walter Raleigh's Roanoke Island Colonies
In Search of the First Colony

Wall Prism

Contents
The Earthwork
Ditch
Ditch Corner
Ditch Prism
Ditch Wedge
Wall
Wall Corner
Wall Prism
Wall Wedge
Results
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The wall's wedge sectors were in the shape of trapaziodal prisms. It was assumed that all of the sectors are the same width across and height throughout, but the lengths vary for each sector.The minimum and maximum estimations of the length and volume of each sector can be found in the charts below.

The area of the cross section was found using the following information. It was assumed that the top, bottom, and height of each sector were the same:

T(top)    B (bottom)   H(height)
Cross Section(area) = H*(B + T)/2

The volume of each sector was found by multiplying the area of the cross section and the length of each sector, which are found in the charts below. (Area of Cross Section * Length)

Sector Number Sector Length Sector Volume
1 20-21 587.6-698.775
3 22-23 646.36-765.325
5 21-22 616.96-732.05
7 4-5 117.52-166.375
10 26-28 763.88-931.7
12 23-24 675.74-798.6
14 11-14 323.18-465.85
16 6-7 176.28-232.925
18 26-27 763.88-865.15
20 5-6 146.9-199.65
22 12-17 352.56-565.675
24 11-12 323.18-366.025
26 9-10 264.42-332.75
27 10-11 293.8-366.025
28 20-21 587.6-698.775
2a 2-3 58.76-99.825
2b 7-9 205.66-299.475
Total Volume 6904.3-8584.95 ft^3
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