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Flint from the Pennsylvanian of Ohio, USA.
Flint is the "official" state gemstone of Ohio (actually, there's no such thing as "official" anything). "Flint" is sometimes used as a lithologic term by modern geologists, but it is a synonym for chert. Flint and chert are the same - they are cryptocrystalline, quartzose sedimentary rocks. Rockhounds often assert that flint is high-quality while chert is low-quality. Some geologists assert that "flint" implies a biogenic origin and "chert" implies a chemical origin.
Many cherts do have a chemical origin - chert nodules are moderately common in some limestone units. The nodules form during diagenesis - pre-existing silica components in the carbonate sediments are dissolved, mobilized, and reprecipitated as chert masses. Some cherts do have a biogenic origin - for example, radiolarian cherts (rich in radiolarian microfossils) or spicular cherts (rich in siliceous sponge spicules).
The most famous flint deposit in Ohio is Flint Ridge, in Licking County. At this locality, the Middle Pennsylvanian-aged Vanport Flint is exposed in several places. The geologic literature on the Vanport Flint is relatively sparse, with inaccurate, incomplete descriptions and characterizations. For example, the literature describes the Vanport as a sheet of flint at Flint Ridge - it's actually a meganodule horizon. Other descriptions refer to the chert as the remains of siliceous sponges. In reality, siliceous sponge spicules are quite scarce in Vanport samples.
Two graduate student projects during the 2000s, conducted at two different universities, had very different conclusions & interpretations about the origin of the Vanport Flint. A 2003 study concluded that chert at Flint Ridge is biogenic in origin. A 2006 study concluded that the chert is chemical in origin. Some Pennsylvanian-aged cherts in eastern America are inferred to be ultimately derived from quartzose eolian dust on seafloors.
Modern flint knappers value the Vanport Flint for being multicolored and high-quality (= very few impurities). With artificial heating, the flint is more easily knapped into arrowheads, spear points, and other objects. Prehistoric American Indians quarried the Vanport Flint at many specific sites on Flint Ridge. Old Indian flint pits can be examined along hiking trails in Flint Ridge State Park ("State Memorial"). Many authentic Indian artifacts found in Ohio (arrowheads & spearpoints - "projectile points") are composed of Vanport Flint.
Stratigraphy: Vanport Flint, Allegheny Group, upper Middle Pennsylvanian
Locality: Nethers Flint Quarries - flint pit in the woods on the southwestern side of Flint Ridge Road, eastern Flint Ridge, far-western Muskingum County, east-central Ohio, USA (vicinity of 40° 00.137’ North latitude, 82° 11.544’ West longitude)
This is our Washington state bird & flower. The Willow Goldfinch & the Coastal Rhododendron. I used watercolor paints, wc pencil & pen & ink on HP watercolor paper. This has also been posted by the recipient to the postcard art swappers group. www.flickr.com/groups/post_card_art_swapers/
Allen Buckner, Director of VR Product Management and Vertical Segment Development at HP Workstations, addresses the 2nd annual Virtual and Augmented Reality Symposium in the Multi-Purpose Stadium. October 20, 2017
Alfred A. Loeb State Park is a state park in the U.S. state of Oregon, administered by the Oregon Parks and Recreation Department. Located on the banks of the Chetco River east of Brookings, the park offers camping, hiking, fishing, swimming, and rafting opportunities. In the park’s boundaries are 3 rental cabins, 53 camping sites, a launch area for drift boats, a day-use area, and the head of a 0.75-mile (1.2 km) trail that the official Web site says leads to the northernmost redwood grove in the United States. (oregonstateparks.org/index.cfm?do=parkPage.dsp_parkPage&a...)
43 State Street, Charleston, SC. Photo taken circa 1930.
Image and text posted: 25 July 2011
Revised: 25 July 2011
Copyright reference: Gibbes Museum of Art photo collection; original image is believed to be in the public domain.
I'd never noticed this type of State Police post before, and though it looked a little Frank Lloyd Wright-ish. I was no sooner 3 feet out of my truck as a trooper pulled up next to me and asked what I was doing. (sigh) Damned 9/11 paranoia. I explained, and she was really nice. She told me the building was from the 40's, and that it was falling apart inside. What a shame. I'm used to seeing the "blockhouse" style posts, so this really caught my eye. If they ever move out, it'd make a great house, doncha think?
To that trooper, thanks for the info, and the website links to the MSP history. I owe you a donut! ;-)
Sorry about how dark this is, but there was a severe thunderstorm chasing me.
Lilium catesbaei. Family Liliaceae.
In open Longleaf Pine (Pinus palustris) forest. Colt Creek State Park, Polk County Florida. September 22, 2019
Julio Blanco. Polk State v. Eastern Florida State College. Winter Haven, Fla. Jan. 27, 2018. (Photo by Tom Hagerty, Polk State.)
DUN DUN DUNNN!
For those of you who didn't know, I had state this weekend on Saturday for Science Olympiad and I competed in Herpetology (the study of reptiles and amphibians, not herpes) and Oceanography. Also for those of you who didn't know, that's a medal, a silver medal to be exact. That's right kiddies! Sarah & her partner Will got SECOND in Herpetology at State out of 37 teams. Unfortunately we missed first place by two points, two freaking points!
I am massively happy, and massively tired. I didn't get home until 11 PM Saturday and then I went to post prom because I decided to miss prom this year since I didn't want to be freaked out. Post prom went until about 4 in the morning and I didn't go to be until six-ish. I've been going to bed after 1 in the morning for the past week so I haven't gotten a lot of sleep lately (not to mention I had the ACTs last week too), and I have school tomorrow. Kill me now!
Anyways I'm very happy and excited to compete next year with my partner again and get first place. By the way the medal is freaking huge! It's like the size of a cookie!
Uhm other random things to say:
---Please check out my website sometime, you can find the link on my profile since flickr destroys links to freeweb when you post the link here. I'm keeping a blog there and I'm trying to update it frequently, so you'll be able to find new things there if you look at it!
---My Birthday is in TWO days (nearly a day my time, on 30 minutes until midnight here), I'm totally excited even though I have yet to organize a birthday party (I've been too busy, can't you tell?!?!)
Anyways, love you guys! n_n