How tall can a salt dome be in the subsurface?

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salt dome Figure 1: Interrelationships of salt structures (see text)

The height of a salt dome in the subsurface varies significantly. Typically, these geologic structures are at least 2 kilometres (about 1.2 miles) high. However, it is well-documented that some salt domes reach heights exceeding 10 kilometres (approximately 6.2 miles).1