Well SureBob, I can explain it.. See 80m x 3` = 240 ft deep real close x about 1,500m long 4,500 ft and about 300m wide 900 ft real close just for shiz & giggles.
Now the average one story building is 15 ft tall, so that is about 5.3 story's thick about 5 city blocks wide (Where I live.) and about 1 mile long. That's just my explanation of one of the Veins at the Baja 14.. :-) lol