This is a strike-slip fault, where part of Siletzia has been split off; the missing piece may be the Yakutat terrane now at the head of the Gulf of Alaska.
The Yakutat Block is bounded on the northeast by the Fairweather Fault, and on the north by a system of thrust and possibly strike-slip faults in the Chugach Mountains and St. Elias Mountains.
New Kids on the Block | Server Message Block | Nick Jr. (block) | Yakutat | Ken Block | Block Island | Block 5A, South Sudan | Block 5A | block | Back on the Block | writer's block | Ron Block | heart block | Harlon Block | Community Development Block Grant | Attack the Block | William H. Block Co. | Walter Block | Unicode block | Uncle Croc's Block | Tuli Block | Tokyo Designers Block | Revenue block | Portsmouth Block Mills | Porter Block | Peter Block | New Kids on the Block: Live | Ned Block | Ken Block (rally driver) | Kelly Block |