Tuesday, April 10, 2018

Ilmenite



Ilmenite
Ilmenite is iron titanium oxide.  It is ground into a white powder for creating paint and the metal titanium.  Titanium is extremely strong and light and used to build airplanes and once bicycles.  It was the principle metal in the SR-71 spy plane.  

Ilmenite
They started building the SR-71 in the late 60's and had to learn to machine titanium in the process.  Kelly Johnson was the guy who designed it.

Ilmenite
These samples come to us from the 3-M quarry in Littlerock, Arkensas. 
 

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Saturday, April 7, 2018

Weeds



Weeds AKA Pussy Willow
Coming from my monoculture agricultural background, I called these plants all weeds.  A weed is anything not planted and not supposed to be growing there.  The fence row was full of weeds.  Weeds grew among the crops.  I can now demonstrate more specificity when referring to those plants.  They are to be killed.

Through my years at Gorman, I came to know the identity of many of the plants growing there.  The plants growing there are mostly perennial or annual growing back each year from the seed of the previous year.  They are decidedly not a monoculture but rather a "multiculture".  I may have coined that word but I think you can see the sense in which I am using it.

A multiculture is more robust in its survival and therefore a more secure food source. 

Most of the cultures, groups of people, on Earth began as Hunter/Gathers.  They later began to domesticate plants they liked.  It was a much more efficient way to grow food as long as weather and other natural forces cooperated with the growth of that type of plant.

Another benefit of monoculture allows people to remain in one location rather than leading the nomadic life in search of food.  I integrated this thinking from Guns, Germs, and Steel by Jared Diamond.  We clearly enjoy a locational stability the Hunter/Gatherers did not.  Who is to say which is better, certainly not I. 


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Wednesday, April 4, 2018

Yofortierite



Yofortierite
 You may remember that recently I told you we would look at other minerals which look like dead grass.  This is one.  The sample is from De-mix Varennes qy.,Saint Amable sill Varennes Quebec,Canada.  This is the type locality for this mineral.  Min-dat says its color ranges from pink to pale violet brown.


Sunday, April 1, 2018

Croci for Easter



Croci
Crocus are in the same family as iris.  It is a perennial growing from a corm.  It has been domesticated and is cultivated by people, like me, who like early blooming spring flowers.  You just about have to dig out the corm to make it go away. 



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Thursday, March 29, 2018

A Little Guessing Game



What is it?
 CaCu(AsO4)(OH) is a relatively common arsenate mineral.  This sample is from Gold Hill Mine, Toole, Co. Utah.  What do you think?  Do you want it on your wall?

Monday, March 26, 2018

Feathertop Grass



Feathertop Grass, Pennisetum villosum
 This from Kingwood Center in August, 2006.  Wikipedia says it is native to Northeastern Africa and part of the Arabian Peninsula.  It is grown else where as an ornamental grass.  It is perennial growing from rhizomes to about 30" in height.




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Friday, March 23, 2018

Conichalcite



Conichalcite
The green spheres in the vug are conichalcite.  Around the edges of the vug we see calcite
crystals, mostly translucent but a few green ones containing impurities of probably copper. 
The formula (CaCu(AsO4)(OH)) shows us conichalcite contains calcium, copper, arsenic,
oxygen and hydrogen



Conichalcite
Please notice that the crystals are on a shelf above the vug of conichalcite.


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