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E;*+ - Geological Curators

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Model No.<br />

Equivalent Model No.<br />

in 1841 Set Description<br />

1 Horizontal valley of denudation in horizontal<br />

strata.<br />

Horizontal hill of denudation in horizontal<br />

strata.<br />

Inclined valley of denudation in horizontal<br />

strata.<br />

Inclined hill of denudation in horizontal strata.<br />

Coal strata near Newcastle-on-Tyne<br />

Modelled topography in horizontal strata.<br />

Dislocation of strata in Carboniferous rocks.<br />

Erosion surface, with parallel contours, in<br />

horizontal strata.<br />

Repeated normal fault offset of horizontal<br />

strata; plane surface topography.<br />

Repeated normal fault offset of nearly<br />

horizontal strata; with full topographic<br />

expression.<br />

Crossing normal faults in horizontal strata,<br />

with surface expression of one horizontal<br />

coal seam.<br />

Repeated n oml fault offset, with trough<br />

faulting, in horizontal strata, with full<br />

topographic expression.<br />

Crossing normal faults in horizontal strata,<br />

with full topographic expression.<br />

Valley in horizontal strata (topography more<br />

pronounced than in Model Ia).<br />

Vertical intersection of mineral veins; plane<br />

surface topography.<br />

Denudation of mineral veins; full topographic<br />

expression.<br />

Vertical strata crossing a valley; full<br />

topographic expression.<br />

Strata inclined upstream in a valley; denuded<br />

basset of inclined strata.<br />

Strata inclined downstream steeper than valley<br />

slope; undercutting of strata.<br />

16 Inclined strata in plane surface topography.<br />

17 Vertical strata in plane suiface topography.<br />

Table 3 Comparison of the models shown on the working drawings with the<br />

twelve models published in 1841.

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