12
RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL
Ceocal
a
v
Ocean Level
Reef
>
/
- = STATE 1:
OceanSotsey
Coral reef begins
mtne sorder of a volcanic
ishand.
VOLCANIC
-
T504ND
Crustal Laver
Coral Reef
Lo Lagoon, N
Ai
— Deo4 7a
Limestone
Ocean Level
[
Ocean Level
STACE 2:
Coral reef grows
upward and inward as the
original island subsides
and/or the ocean Level crises.
27
Crustal Layer
Exposed Limestone
Island
Ocean Leval
Ocean Sottog
Ocean Level
Qcean Bottom
a
STACE 3:
Ocean level subsides and/or island rises
exposing the coral limescone
to leaching, reccystaliza-
tion and erosion.
7
“Crustal Layer
Biken Is.
Lojwa [s.
tagooa
!
Ocean Level
Ocean Level
éan Jocrom
STAGE 4: Small tslands forms
and coral growth resuses as
ocean level rises and/or
original island subsides.
ORIGLNAL ISLAND
a
cae
went
se oe rts
Crustal Laver
ts
7 7
After USCS Professional
Bapers 260-S (Riate) and
260-88 (Schlanger and others)
FIGURE 1-17. EVOLUTION OF ENEWETAK ATOLL.