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September 27, 2015 Weekly Weather and Geology Guess

September 27, 2015
Greetings from the Bluff Park Back Porch, way up yonder on Shades Mountain (1,109′) in Alabama:


Now?!  Onward to one of my favorite types of lava.


C _ _ _ _ _ _ _  Basalt.  What is it?

See below for discussion.

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Last Week On the Bluff :

–  88 was the high and 61 was the low and an average of 71.
–  Humidity ranged from 35% to 98%, with an average of 74%.
–  Rainfall total on the Bluff was 0.05 inches. 
–  Maximum wind gust was 13 mph.
Metro Birmingham Forecast for the New Week
 
–    80 is the forecast high and 62 is the forecast low.
–    1.7 inches of rain is forecast for the week.
–    Rain is forecast through Thursday.
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Weather Guesses


Alabama All Weather Hazards Awareness:
http://www.srh.noaa.gov/images/bmx/aware/swaw_2011/web_version2.pdf

NWS, Huntsville, AL:        http://www.srh.noaa.gov/hun/
NWS, Birmingham, AL:     http://www.srh.noaa.gov/bmx/
NWS, Mobile, AL:              http://www.srh.noaa.gov/mob/

Metro Birmingham.  Compliments of ABC3340.

(for Detailed Graphical Forecast)
Weather Underground Map for Metro Birmingham.
(Just wander around the state to pick your closest weather station).

http://www.wunderground.com/wundermap/?lat=33.24038696&lon=-86.82407379&zoom=10&pin=


Weather Forecast by AccuWeather  (Pick your time, day, or month)
Space Weather.  http://spaceweather.com/

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Minerals and Rocks – The Good Life from the Ground
 
“If it ain’t grown, it has to be mined”
VOLCANO
AND
LAVA
 
 
Basalt:       “By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase. Basalt features a glassy matrix interspersed with minerals.”
A flood basalt is the result of a giant volcanic eruption or series of eruptions that coats large stretches of land or the ocean floor with basalt lava.
Columnar Basalt:
“During the cooling of a thick lava flow, contractional joints or fractures form. If a flow cools relatively rapidly, significant contraction forces build up. While a flow can shrink in the vertical dimension without fracturing, it can’t easily accommodate shrinking in the horizontal direction unless cracks form; the extensive fracture network that develops results in the formation of columns. The topology of the lateral shapes of these columns can broadly be classed as a random cellular network. These structures are predominantly hexagonal in cross-section, but polygons with three to twelve or more sides can be observed.[8] The size of the columns depends loosely on the rate of cooling; very rapid cooling may result in very small (<1 cm diameter) columns, while slow cooling is more likely to produce large columns.”

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“No copyright infringement intended.
The rights belong to their respective owners”
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Copyright Disclaimer: Under Section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.

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Author’s Request:  If you see any pictures that you know the source and photographer, let me know immediately.  Thanks!  R

Images have been searched by TinEye Reverse Image Search.  http://tineye.com/
All volcanic pictures for this week were screened through Wikipedia.com

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Have A Great Week!
R
Columnar Basalt.  Devils Postpile NM.  Mammothe Lakes, CA.  07-13-2013. Dicjlyon

Columnar Basalt. Devils Postpile NM. Mammothe Lakes, CA. 07-13-2013. Dicjlyon

Columnar Basalt.  Devils Postpile NM.  Mammothe Lakes, CA.  10-13-2010. Frank Kovalchek

Columnar Basalt. Devils Postpile NM. Mammothe Lakes, CA. 10-13-2010. Frank Kovalchek

Columnar Basalt.  Devils Postpile NM.  Mammothe Lakes, CA.  Oct 1997. Cooper.ch

Columnar Basalt. Devils Postpile NM. Mammothe Lakes, CA. Oct 1997. Cooper.ch

Columnar Basalt.  Fingals Cave, Staffia, Scotland.  July, 2004. Hartmut Josi Bennöhr

Columnar Basalt. Fingals Cave, Staffia, Scotland. July, 2004. Hartmut Josi Bennöhr

Columnar Basalt.  Garni gorge.  The Earth Story

Columnar Basalt. Garni gorge. The Earth Story

Columnar Basalt.  Giant's Causeway, N. Ireland.  01-23-2010. Chmee2

Columnar Basalt. Giant’s Causeway, N. Ireland. 01-23-2010. Chmee2

Columnar Basalt. Litlanesfoss falls, Iceland. Steve Rose, ‎The Rockhound Connection

Columnar Basalt. Litlanesfoss falls, Iceland. Steve Rose, ‎The Rockhound Connection

Columnar Basalt. Red Basaltic Prisms. Giant's Causeway, N. Ireland.  2007. missofotz

Columnar Basalt. Red Basaltic Prisms. Giant’s Causeway, N. Ireland. 2007. missofotz

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