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Archaeology: Module Introduction
Aviator's Cave
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Birch Creek Rockshelters
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Bobcat Cave
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Buhl Burial
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Challis Bison Sites
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Chronological List
Corn Creek
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Dagger Falls
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Redfish Overhang
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Sheepeater Camp
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Shoup Shelters
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Simon Clovis Cache
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Wahmuza
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Wasden
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Weston Canyon Rockshelter
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Wilson Butte Cave
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Handbook
About the Author
About This Guide
Contents
EndNotes
Lanceolate Points
Birch Creek
Clovis
Cottonwood Triangular
Folsom
Haskett
McKean
Wahmuza Lanceolate
Measurements
Name Index
Notched Points
Avonlea
Desert Side-notch
Desert Tri-notch
Elko Corner-notch
Northern Side-notch
Rosespring Corner-notch
References
Stemmed Points
Cody
Gatecliff Split-stem
Visual Index
Papers
Module: Cataldo Mission
Cataldo Mission Summary
Cataldo Mission Timeline
Further Readings Cataldo Mission
Module: Cataldo Mission Artifacts
Module: Cataldo Mission Location
Coeur D'Alene River
DeSmet, Idaho
St. Joe River
Module: Cataldo Mission Recruits
Antonio Ravalli and Brother Huybrechts
Father Joseph Joset
Father Joseph M. Cataldo
Father Pierre Jean DeSmet
Point and Huet
Module: Early Missionary Activity
Mission of the Sacred Heart
Mormons at Fort Lemhi
Spauldings and Whitmans
Module: EBR-I
EBR-I Further Reading M
EBR-I Summary M
EBR-I Timeline M
Module: EBR-I Artifacts
Module: EBR-I Science Makes History
Breeder Reactor
NaK Coolant
Plutonium Reaction
Module: The EBR-I Team
Harold Lichtenberger
Leonard Koch
Walter Zinn
Module: The NRTS - Why in Idaho?
Community Support for EBR-I
Isolated, but Not Too Isolated
The Naval Proving Ground
Photos
Boise
Pocatello
Soda Springs
Tribal
Theses
Anthro
Education
Geology
IRI
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Handbook
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Archaeologists collectively refer to spear points, dart points and arrowheads as "projectile points." Spears are propelled by the arm without the aid of any other device, and spears need to be heavy to penetrate deeply. Darts are smaller than spears and are propelled by an "atlatl" which is a stick held in the hand with a hook on the end that seats into a socket in the butt of the dart. The atlatl adds considerable leverage propelling the dart several times faster than can be thrown by arm alone, and its penetration is as much a product of its high velocity as its mass. Arrows are propelled by bows and they travel considerably faster than is possible for either darts or spears, and it is their velocity, not their mass, which produces deep penetration. In this guide, points are divided into two categories: small and large. Small points are arrow points and large points are dart and spear points.
This approach of measuring the
Shoulder Angle
from a horizontal line follows
Thomas 1981
. This is probably the best way to measure the
Shoulder Angle
to avoid positive and negative angles, as well as angles that exceed 360º.
Points with
Blade Widths
close to 16.5 mm might be misclassified. Although very rare,
Northern Side-notched
points were made unusually small (e.g.,
Northern Side-notch photo g)
or have been resharpened enough to reduce
their blade widths
sufficiently to measure within the upper range of
Desert Side-notched
points. Also rare, Small Notched points of various types do exceed the 16.5 mm threshold. However, this applies to only four points out of over 400 notched points (less than 1%) in the Eastern Idaho Database.
All content Copyright © 2009 by Richard N. Holmer
Informatics Research Institute
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