|
Horizon
|
Age
(Ma)
|
Definition
|
Color
|
References
|
|
H1
|
~1
|
Mid-Pleistocene Transition (MPT)—local angular erosional unconformity created by shelfal glacial advance
|
Violet
|
Worthington et al. (2008); Berger et al. (2008a)
|
|
H2
|
~1.8–1
|
Arbitrary time marker
|
Blue
|
—
|
|
H3
|
1.8
|
Pliocene–Pleistocene transition
|
Yellow
|
Zellers (1995)
|
|
H4
|
~5.9
|
Yakataga Poul Creek contact; generally defines onset of glaciation
|
Green
|
Zellers (1995)
|
|
H5
|
|
Acoustic basement; contact between shelf sediment and Yakutat basement crust
|
Purple
|
—
|