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!

ROADSIDE GEOLOGY FIELDTRIPS
Provides unique insights into various geo- logical failures and disasters, causes and effects of erosion, interpretation of surface features. 2 pgms. 176 slides, rich texts.
#EP-2003X SLIDES
$129.95

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SAVE $40.00 ON 2 SLIDE SET BUNDLE ORDER #EP-2003X...........$129.95
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A GEOLOGY FIELD TRIP THROUGH THE APPALACHIANS OF PENNSYLVANIA
Slides order #EP-2003S.........$99.95
Video order #EV-2003V.........$99.95

Familiarizes students with the complexities of Appalachian geology. 43 individual
field trip stops are located on maps and detailed with photographs of salient features.
Designed to be used in the classroom as a substitute, or as preparations for, a field trip
to the region, and in the field for checking observations. Especially useful for classes able
to schedule field trips to this area, but can also provide classes in other parts of the
country with unsurpassed insight into the Appalachians. Includes extensive supplemental
information, field trip questionnaire and answer key, suggested projects and additional
references. 114 slides in notebook, cassette, guide and supplemental information. Video
or slides. (Video order #EV-2003V.........$99.95.)

REVIEWS: "This is an excellent program,...will give more advanced students a working
knowledge of how a geologist collects and interprets data...flexible...carefully chosen photo-
graphs...guide provides a wealth of additional information." Media Review. "...clear and well
organized...Good for senior high school, community college, and college geography and geology
classes, and possible regional public library use." Booklist.
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INTERPRETATION OF ROADSIDE GEOLOGY Slides order #311X................$69.95

A detailed study of roadcuts, quarries and natural ledges, showing pertinent
geological phenomena. Photographs show the outcrop in its natural appearance and
paired drawings, traced from the photographs, extract the geology of the outcrop.
Tracings may either be projected alongside the photograph or may be projected over the
photograph. Texts discuss the detail of the geology displayed and work out the geological
history of the outcrop. A total of 2O photographs, 2O matched diagrams and associated
texts. 40 slides and guide.

PART I: Thrust fold and fault, allochthonous limestone block, pillow lava, basalt
sill, shear zone, unconformity in strata, enechelon tension cracks in limestone, tubular
intrusion of diabase into marble, glacial scratches, internal structure of pillow lava.

PART II: Dykes made at different times of geologic history, parasitic folds, marble
intrusion into basalt, pegmatite dyke, stromatolites, ripplemarks, granitization of basalt,
joint pattern, fault surface, branch faulting and breccia.

REVIEWS: "The quality of your transparencies (and graphics!) are superb...I am delighted
to say that the work your company turns out is exceptional." B.T., Asst. Prof. of Geology,
Hamilton College.
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~1874-109~ Mountain. photo by Jan L. Wassink.

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