Rock of Ages

Winter 2015 - Volume 19 Number 1

 Rock of Ages

Rock of Ages
by Sally J Cullen, MD, MS

This photograph was taken in Zion National Park in Utah. The monument pictured was formed
by millennia of cascading water cutting through and eroding the sedimented and lithified Navajo
Sandstone. The incredible rock layers of Zion are part of a system stretching from Bryce Canyon to the
Grand Canyon.

Dr Cullen retired in 2012 after more than 32 years practicing medicine. She now uses
photography to show how our national parks are our great heritage, and how
they can be our great legacy if we protect and celebrate them. More of Dr Cullen's
photography may be seen at: www.myparkphotos.com/ property/SallyCullen.html.

CME

The Kaiser Permanente National CME Program designates this journal-based CME activity for 4 AMA PRA Category 1 Credits. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

Circulation

27,000 print readers per quarter, 15,350 eTOC readers, and in 2018, 2 million page views of TPJ articles in PubMed from a broad international readership.

The Permanente Press

The Permanente Press publishes The Permanente Journal and books related to healthcare. For information about subscriptions, missing issues, billing, subscription renewal, and back issues, Email: permanente.journal@kp.org.


ISSN 1552-5775 Copyright © 2019 thepermanentejournal.org.

All Rights Reserved.