File:Columnar basalt.jpg

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On road to Lake Ann trailhead see Geology of North Cascades (Tabor and Howland) p. 89 Figure 73

This basalt forms in columns which are oriented vertically, with the polygons (in this case mainly hexagons) forming as the basalt cools and shrinks.

Date

12 August 2006, 20:06:39

Source

originally posted to Flickr as Columnar basalt

Author

J Brew

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	00:59, 23 March 2009		2,592 × 1,944 (1.55 MB)	Flickr upload bot (talk \| contribs)	Uploaded from http://flickr.com/photo/93452909@N00/214550451 using Flickr upload bot

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Camera manufacturer	NIKON
Camera model	E5600
Exposure time	10/2,253 sec (0.0044385264092321)
F-number	f/4.9
ISO speed rating	50
Date and time of data generation	20:06, 12 August 2006
Lens focal length	5.7 mm
Software used	E5600v1.0
File change date and time	20:06, 12 August 2006
Y and C positioning	Co-sited
Exposure Program	Normal program
Exif version	2.2
Date and time of digitizing	20:06, 12 August 2006
Image compression mode	4
APEX exposure bias	0
Maximum land aperture	3 APEX (f/2.83)
Metering mode	Pattern
Light source	Unknown
Flash	Flash did not fire, compulsory flash suppression
Color space	sRGB
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	0
Focal length in 35 mm film	34 mm
Scene capture type	Landscape
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown