ek eek es a ada
es:
(1) The
four principal zones.
nels com-
terrace.
ef of one
(2)
At
These are
The Algal Ridge does not rise to a well defined crest; instead
The zone is about 200 feet wide.
maximum of 1 foot above low tide level.
*y¥ probably
The Reef Flat, which at low tide is covered with about 1 foot of water,
f the zone
(3)
is a
floor of algal limestone, irregular and hummocky with sandy patches in the
l1x inches
hollows.
910 feet
This zone is about 50 feet wide.
about 30 feet wide,
essions,
(4)
The Beach Rock Zone, which is
consists of a rough rock platform on which lie boulders and
the bedded sandstone of the islet shore.
ard with
The lagoon beach side of KEITH is
composed of a sharply sloping and narrow sand beach which extends down to about
2ple-marked
low water level and there meets a flat of coral limestone which gradually slopes
-omeg
downward as one proceéds toward deeper lagoon water.
The lagoon
Heavy vegetation on KEITH is located principally on its northwestern half.
am ebSS
ng
ward and
1 edge
i oetciE mN,
*astward
about 0.3
by south-
A heavy stand of mature coconut trees dominates this area.
The southeastern half
of the islet supports only secondary brush-type vegetation, principally Scaevola.
(See Section 6.)
MACK is an artificial site built upon a very large coral head which is
located in the northeastern quadrant of the lagoon.
MACK is approximately 7
miles due west of YVONNE and § miles due south of JANET.
instal-
This site consists of
a large platform some 10 feet above sea level upon which has been built a steel
L topo-
tower some 45 feet in height (Figure 12).
narrow
REllea meee
ae
ONSIE i bile ee
this
There are no exposed land areas at
site,
6.
VEGETATION
Eniwetok Atoll is considered on the basis of the vegetation to be one of
the drier of the Marshall Islands.
as Polypodium and Asplenium,
on many of the other atolls.
rea
This is evidenced by the lack of ferns such
and of shrubs such as Pipturus, which are present
The paucity of bryophytes and foliose lichens above
a4 meter or a meter and a half above the ground is further indication of the
BeeAs abc
1 into
a
there are scattered hummocks or mounds about 20 to 60 feet across that rise to a
numeroug
t nearly
ad
about 30 feet deep at the reef edge and continue seaward to the edge of the
‘one is about
-€3 near
okt ice ee
separated by wide
deep canyon-like channels which extend far down below sea level.
3 are floored
211).
dean
The Terrace slopes seaward for some 100 to 300 feet,
its outer edge 1t consists of irregular lobate algal spurs,
°ts of the
land
Eat
where at an apparent depth of 10 or 15 fathoms it drops off quite steeply.
3 & whole ig
bove 13
(1)
ddl
Ma
he
comparative dryness.
15
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mee es oe ee <tr ARAN Ae
a
ame
"
me egetAE
,