Erosion surfaces must be considered when superimposing the thickness of the overlying layer--if the overlying layer is faulted, the same displacement must be reflected in the erosion surface (Fig.
Such layers are constructed volumetrically by filling the empty space between the underlying layer and the erosion surface (Fig.
The Devonian erosion surface was constructed by superimposing the thickness of the D2rz-pr and D1km layers where applicable topography was obtained by subtracting the thickness from the topography of the Parnu surface.
Where applicable, the layer extents were constructed in the wedge in the Devonian erosion surface.
The extents of the modelled layers using the approach developed by us are defined considering a continuous surface until the interruption in the overlapping erosion surface or in a fault.
Therefore, the extents of the layers are defined automatically on the wedge line between the modelled layer and the erosion surface, extending the layer distribution known from the map (Fig.
By introducing the surfaces in depositional and erosion surface categories, intersecting and segmenting each layer with faults or overlapping erosion surface, the resulting geometry shows correct topologies and thickness distribution of sedimentary layers.
The applicable layer topography is obtained by sequentially filling the empty volume between the base and erosion surfaces with modelled slices.