Natural Arch Information
By Jay H. Wilbur
This section of the Natural Arch and Bridge Society website provides
straightforward answers to common questions about natural arches. It
has been structured so that someone with only a casual interest can
get simple answers to basic questions, but also so that someone who
wants the details can find them through the magic of hyperlinks. For
those who are already familiar with the basics, the menu on the left
of each page provides quick access to the reference material that is
most often used. Those who want to review the basics, and those who
just have a question or two, should begin with the list of frequently
asked questions (FAQ).
About This Site
The author of these "ARCH INFO" pages has a Master of
Science degree and over 40 years of experience studying natural arches.
He has established ties with most other serious researchers in this
discipline. Moreover, the information presented here is not just the
opinion of the author. Rather it is an amalgamation of the work of several
authors, both past and present, culminating in the decisions of the
Standards and Definitions Working Group of the Natural Arch and Bridge
This Working Group deliberated between 1990 and 1994. It included
geologists, physical geographers, a physicist, and a mathematician.
It considered all of the serious literature available on the subject
at that time, the expert opinions of its members, and the solicited
opinions of other experts. Its purpose was to mitigate the lack of widely
agreed to standards and definitions to guide the study of natural arches.
To a large extent, it achieved that purpose.
The information presented here is offered in the hopes that it will
clear up ambiguities and conflicting information found in other sources,
including some of the governmental agencies responsible for protecting
and interpreting natural arches to the public. It is hoped that researchers,
educators, and responsible agencies (e.g., the NPS, BLM, USFS, and various
State Park agencies) will adopt and reference the information presented
These pages are offered as a public service. Links to this section
of the website are welcome. However, these pages are copyrighted and
should not be reproduced without the consent of the author.
As the author of these pages, I am always interested in comments,
questions, and criticisms of both the content and format of this site.
Of course, I also enjoy receiving information about natural arches,
especially information or questions relevant to their study. Feel free
to email me by clicking here.
Copyright 1993, 1994, 2002, 2003, 2004, 2005, 2006, 2007
by Jay H. Wilbur,