Block mountains are caused by faults in the crust: a plane where rocks have moved past each other. When rocks on one side of a fault rise relative to the other, it can form a mountain. The uplifted blocks are block mountains or horsts. The intervening dropped blocks are termed graben: these can be small or form extensive rift valley systems.
â The annual fee of the credit card was nothing, so the individual committed to paying the card off each month, and enjoyed the card.
Most of these cards charge high annual fees (one exception is the Expedia+ Voyager Card with an annual fee of $95) so I would not get a card solely for the Global Entry or TSA Pre fee reimbursement. Some of these cards offer additional airline fee credits which may offset the high annual fee but it depends on whether those are of use to you personally.