FREQUENCY: Very rare
FREQUENCY: Very rare ([Dungeon Level VII])
FREQUENCY: Common ([Ethereal Plane])

NO. APPEARING: I
ARMOR CLASS: 2
MOVE: 6"
HIT DICE: 8, 12, or 16
% IN LAIR: Nil
TREASURE TYPE: Nil
NO. OF ATTACKS: 1 ~ 12 (HD 8) | 9 (HD 12) | 7 (HD 16)
DAMAGE/ATTACK: 4-32
SPECIAL ATTACKS: See below
SPECIAL DEFENSES: +2 or better weapon to hit
INTELLIGENCE: Low
ALIGNMENT: Neutral
SIZE: L
LEVEL/X.P. VALUE: VII | 2850 + 15

SAVES, 8 HD: 10.11.12.12.13
SAVES, 12 HD: 7.8.9.8.10
SAVES, 16 HD: 4.5.6.4.7

These powerful creatures travel rather slowly, and in order to cross water
they must travel through the ground and go under the bed of the body of
water (possibly a long trip). They score full damage against any creature
which rests on the earth, -2 on each die of damage against other
opponents (flying, levitating, etc.). Against constructions built on stone or
earth they act as a super battering ram, causing 2-8 points of structural
damage (a typical cottage having about 7 structural points). They can be
summoned from earth or stone.

On the elemental plane of earth there exists a boss rumored to be of astounding size.

(see also Xorn)

Elementals: Most elemental creatures are hostile at worst (or
uncaring at best) toward humanity and other Prime Material
beings. The elementals of Earth are more so than is normal,
owing to the fact that most travellers cannot pursue them far into
their own plane. They generally prefer to be left alone, but serve
as elemental guides provided the price is right (and the more
intelligent elemental ceratures drive a hard bargain indeed). The
only good things to be said about earth elementals are that they
are strong and their normal interests lie in something that adventurers
usually carry--gems.

    Elemental creatures and monsters come in a wide variety of
forms--usu. large, blocky creatures filled with angles and
sharp edges. Using their passing ability to reach parts of the
plane unreachable by lesser mortals, the elementals prefer a quiet
existence.

Source = Manual of the Planes

-
At that time elementals were rubbery dime store critters about 65 mm scale, each vaguely reminiscent of the element it represented, the fire figure a red and orange, the water one shades of blue,
Can't recall the color of the air one, but it was whirrled I think.
The earth elemental figurine was sort of man-like and lumpy perhaps.
Memory begins to fail me after some 35 years.

Cheers,
Gary