Report of the Annual Meeting (1903) "On the Occurrence of the Nodular concretions (Coal Balls) in the Lower Coal Measures. As stated above, these clay concretions are the result of the accretion of calcite. Here is a collection of odd or interesting concretions gathered from various parts of Arkansas. See more ideas about rocks and minerals, minerals, gems and minerals. But large or elevated concretions, especially in the upper lid, are more likely to rub the bulbar conjunctiva or cornea during the blinking process. Food, epithelial and bacterial debris then accumulate within these crypts and produce a chronic inflammation. Most iron ore deposits consist mainly of hematite, magnetite, or both. Concretions can have regular shapes like blocks, boxes, pipes, flat discs, canon balls, or even resemble parts of … Conjunctival concretions are small, typically multiple, yellow-white lesions commonly found on palpebral conjunctiva of elderly individuals and those with chronic inflammation. By JAMES LOMAX. The odd shapes of concretions arouse curiosity and they can often be mistaken for fossils, bones, meteorites or other unusual objects. Definition of Concretion with photos and pictures, translations, sample usage, and additional links for more information. If we were to cut them open they would look something like these next ones Literary usage of Concretions. What are prostatic concretions? Concretions and nodules are found in all of the geologic formations exposed in southwestern North Dakota, and some can be found in glacial sediments and bedrock formations that occur in the eastern half of the State as well. (Photos by John Bluemle). No need to register, buy now! These are a couple of disk-shaped concretions that grew between beds of shale. This one in the above pictures is just begging to be called a fossilized egg. They are thought to be widespread and typically asymptomatic, occurring in 40-50% of studied populations. Shapes of concretions. It appears that there is a natural chemical attraction that causes pyrite to accumulate at a specific point in the shale sediment. These patients may complain of irritation and a foreign body sensation. Below you will find example usage of this term as found in modern and/or classical literature: 1. Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. Patients with concretions are often asymptomatic and usually only require observation. The medical-dictionary defines Prostatic Concretions or Calculus an abnormal concretion, usually composed of mineral salts, occurring within the body, chiefly in hollow organs or their passages. This series of photos shows the accretion of pyrite in the Antrim Shale in Michigan. Also called a stone. Apr 5, 2014 - Explore spring aling's board "Concretions", followed by 111 people on Pinterest. Iron-oxide nodules or concretions are the most common kind of meteorwrong sent to us. Conjunctival concretions (Conjunctival lithiasis) are small vascular, granular, yellowish-white deposits being produced due to conjunctival degeneration and are found in the sub-epithelium of palpebral conjunctiva and fornix (junction between palpebral and bulbar conjunctiva) in the elderly group or in patients with chronic inflammatory conditions. Concretions of varying size and consistency can form within the substance of the tonsils. Find the perfect concretion stock photo. Hematite and magnetite are two common iron-oxide minerals. Repeated episodes of inflammation may produce fibrosis at the openings of the tonsillar crypts.
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