GEOLOGY and EARTH SCIENCE

Introduces glaciers, fossils, rock formation
and erosion, geological structures, plate
tectonics, evolution, atmospherics, astron-
omy & space science. Very rich resource
material, some at OVER 50% DISCOUNT!

CAVE DEVELOPMENT AND ECOLOGY
A close look at caves and what makes them so unique. How they form, what they are like inside, and how certain creature adapt to them. 1 video, 2 slide sets.
#FV-1044X SLI/VID
$119.95

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SAVE OVER $42.00 ON 3 PROGRAM BUNDLE ORDER #FV-1044X...........$119.95
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ECOLOGY OF A LIMESTONE CAVE Slides order #112...........$42.50

The two major theories of limestone cave formation; cave structures; the three
life zones within a cave; and the special adaptations of the creatures found in each are
presented. Photos include cave formations and an extensive collection of cave residents.
20 slides and detailed guide.

CONTENT SAMPLE: 18358 This tiny bat of eastern North America, only two and one-
half inches long, is among the first to appear in the evening. Sometimes they are even seen flying
around during the day. This is one of the pipistrelles (Pipistrelle subflavus), seen here while
hibernating. They are quite common in woodlands in warm weather, but are encountered in caves
in winter less often than would be expected, given their number. Perhaps they find other places to
hibernate.

Pipistrelles prefer to hibernate in places where the humidity is 100%. As you can see,
they often become coated with tiny droplets of water which condenses on their fur. Spelunkers
who see them often claim to have seen “white bats” in caves; one must look closely to see the
true color of these bats. Pipistrelles are tiny creatures, even for bats, and like the majority of our
species are unable to bite through human skin even if angered.

As we have seen, caves are fascinating places populated with unusual things that have
taken long ages to develop. Like other fragile ecosystems, cave systems too cannot survive
pollution, excessive collecting, or ill considered economic exploitation. It is up to us to see that
these rare, timeless treasures are preserved for future generations.

REVIEWS: "Students should respond enthusiastically with both questions and com-
ments after viewing these slides. The visuals are vivid in detail....The printed narrative is very clear
and informative. Highly recommended." Previews. "...your flora and fauna slides were excellent
and the prepared commentary was superior to any I have seen to date." P.H.D. Dept. of Geology,
Herbert H. Lehman College.
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UNDERGROUND WILDERNESS Video order #FV-1044V.............$49.95

Join a group of cavers as they locate and explore a previously uncharted cave.
This program portrays the unique sense of space, suspension and the lost sense of time
that makes up the experience of caving. Includes discussions of cave origins, geology
and rock formations, fragility and scientific value of caves. 104 frames. (Filmstrip order
#FS 1044F......$15.00)
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CAVE DEVELOPMENT AND FORMATIONS Slides order #011-2115......$69.95

Caves come oin an amazing variety of shapes and sizes, and possess forma-
tions which are of interest to amature and scientist alike. Program presents the
formation of caves and their relationship to the surrounding landscape, their importance
to early man, and the varied deposits which create the incredible shapes and structures
found in some caves. 40 slides and guide.
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~1874-015~ Underground river. photo by Charles R. Belinky, Ph.D.

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