When the sun and moon are lined in the same direction the occurrence of a new moon phase and thus the side facing the earth is not illuminated and hence its also called as crescent moon and first quarter moon and when the moon is ending or declining in the phase of waning crescent which shows only a 0.1% of the disk of the moon.
This period stays form 3 am to 3 pm after this the cycle of the moon is completed. Also called as the last quarter, its visibility is also defined by the rotation of angle of the earth and the sunrays.
4 a.m . in the morning San Fran time at the time you depart Boston at 8: am. If for example, this is a 4 hour flight, you will arrive at San Fran at 8:00 a.m
North America and the African plates moved away from each other due to the spreading of the Atlantic ocean and the opening of the mid-Atlantic ridge. That develops a diversion motion and separated the plateau in the west and eastern direction. This also leads to the splitting of the south American plate away from the African continent.