Lake Superior
2 October 2016, Grand Marais, Minnesota
Eleven
hundred
million
years
ago
lava
oozed
midcontinent.
Much later
Ice melted
dropping
satchels
of basalt
to block
the only
drain.
2 October 2016, Grand Marais, Minnesota
Eleven
hundred
million
years
ago
lava
oozed
midcontinent.
Much later
Ice melted
dropping
satchels
of basalt
to block
the only
drain.