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Swiss Journal of Geosciences
Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: A gravimetric assessment of the Gotthard Base Tunnel geological model: insights from a novel gravity terrain-adaptation correction and rock physics data

Fig. 3

Adaptation of the original GBT geological model profile to the reference model line’s topography (green line). One of the following two steps is performed. If the target topography is higher than the original, lithological boundaries are vertically upward continued (thin black lines), and the geological units (coloured) extended and “filled” with the same lithology (left side of the sample section). In the opposite case, the units are simply truncated at the target topography (right side of the sample section). This example is shown without vertical exaggeration, above 2000 m elevation, and is located at the centre of the profile; the highest peak in the original profile is near Piz Vatgira (2982 m), the highest peak along the reference model line is near the 2888 m peak west of Piz Gannaretsch

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