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Show Off for the Show MEMPHIS ARCHAEOLOGICAL AND GEOLOGICAL SOCIETY MAGS Rockhound News ◊ A monthly newsletter for and by the members of MAGS Volume 61 ! Number 04 ! April 2015 ! A monthly newsletter for and by the members of MAGS Show O# For The Show In this issue Show O# For The Fun, Games, & Prizes Show""P. 1 MAGS And Federation April Program 2015 Show Notes""P. 2 Come join your MAGS friends It's time once again to experi- Fabulous Tennessee for an exciting kicko# to our 36th ence the Earth Wide Open at the Fossils""P. 3 Annual Memphis Mineral, Fossil, 36th Annual Memphis Mineral & Jewelry Show, on April 25 & 26. Fossil, & Jewelry Show at the Ag- Show2015 Speakers"P. 4 Be among the first to see the ricenter International. There will Show Hospitality"P. 5 world premiere of The Earth be hundreds of tables filled with 2015 Show Dealers"P. 5 Wide Open, 1974-2015. You may high quality minerals, fossils, jew- Jewelry Bench Tips"P. 5 see yourself, along with many of elry, beads, crystals, art and all the our other Members, helping out at pretty rocks. This year Cub February Board every step of putting on this great Scouts, Girl Scouts, and Boy Minutes""P. 6 event. Scouts can come and meet the re- February Meeting We will have some of our past quirements for their badges in Minutes""P. 7 Geology. We have tons of gems Show chairpeople talking about all April Birthdays"" P. 8 the fun they had putting the Show for our grab bags and gem dig (still Displays""P. 8 together. Idajean Jordan, Alan 25¢ for 3 minutes of mining). New Parks, W. C. McDaniel, and Jim to this year's Show is Steve Arnold Field Trips""P. 8 Butchko, along with some other and his meteorites. Steve has Save These Dates"P. 9 MAGS Members, will share their done shows on national TV show- Natural Quasicrystal experiences. ing his space rocks and will be dis- playing, lecturing, and maybe even From Meteorite"P. 9 If a video and Show chairs are selling at the show. Come to see, MAGS At A Glance"P. 10 not enough, we will have a game or learn, buy, have fun, and to win the two and lots of prizes. We need beautifully sculpted bird or one of your support, so plan to come to the hourly door prizes donated by our meeting at 7:30 P. M. on April our dealers.. 10. It will be fun for all. COME SEE THE WORLD PREMIERE OF THE EARTH WIDE OPEN, 1974-2015 " PAGE 1 MEMPHIS ARCHAEOLOGICAL AND GEOLOGICAL SOCIETY MAGS Rockhound News ! A monthly newsletter for and by the members of MAGS 2015-2016 MAGS BOARD MAGS AND FEDERATION NOTES President–W. C. McDaniel 2038 Central Avenue, Memphis, TN 38104 ◊ (901) President’s Message 274-7706 ◊ [email protected] Welcome to Show month. 1st VP (Field Trips)–Charles Hill 1070 Park Swain Road, Grand Junction, TN 38039 As we approach or count down toward the opening of the ◊ (901) 626-4232 ◊ [email protected] Show, it is helpful to look at Show numbers. 2nd VP (Adult Programs)–Carol Lybanon Continued, P. 4 2019 Littlemore Drive. Memphis, TN 38016 ◊ (901) 757-2144 ◊ [email protected] MAGS General Membership Meetings and MAGS Youth Secretary–Mike Baldwin Meetings are held at 7:30 P. M. on the second Friday of 367 North Main Street, Collierville, TN 38017 ◊ every month, year round. The meetings are held in the (901) 853-3603 ◊ [email protected] Fellowship Hall of Shady Grove Presbyterian Church, 5530 Treasurer–Bonnie Cooper Shady Grove Road, Memphis, TN. 8695 Baylor Road, Arlington, TN 38002 ◊ (901) 444- 0967 ◊ [email protected] MAGS Website: memphisgeology.org Director (Asst. Field Trips)–John McLane 5346 Kristy Lane, Southaven, MS 38671 ◊ (662) We aren’t kidding when we say this is a newsletter for 609-3917 ◊ [email protected] and by the members of MAGS. If an article has a by- Director (Asst. Adult Programs)–Kim Hill line the author is a MAGS Member, unless explicitly 4755 Royal Elm Cove, Memphis, TN 38128 ◊ (901) stated otherwise (we welcome articles by nonmem- 388-7572 ◊ [email protected] bers). If there is no byline, the article was written or Director (Youth Programs)–James Butchko compiled by the Editor (a MAGS Member). Please 4220 Dunn, Memphis, TN 38111 ◊ (901) 743-0058 ◊ contribute articles or pictures (everybody likes pictures) [email protected] on any subject of interest to rockhounds. If it interests Director (Asst. Youth Programs)–Chris you it probably interests others. The 15th of the month is Scott the deadline for next month’s issue. Send material to 4220 Dunn, Memphis, TN 38111 ◊ (901) 743-0058 ◊ [email protected] [email protected]. Director (Librarian)–Ron Brister 3059 Old Brownsville Road, Bartlett, TN 38134 ◊ April DMC Field Trip (901) 388-1765 ◊ [email protected] WHERE: Hogg Mine, LaGrange, GA (fee site, $25) Director (Membership Services)–Bob WHEN: April 18, 8:45 A. M.-5:00 P. M. Cooper 8695 Baylor Road, Arlington, TN 38002 ◊ (901) 444- COLLECTING: Beryl, Star Rose Quartz, Black Tourma- 0967 ◊ [email protected] line, and Aquamarine Director (Historian)–Nannett McDougal- INFORMATION: Je# Edwards, (334) 312-0572, Dykes ◊ 106 Maple Street, Stanton, TN 38069 ◊ [email protected] or (901) 634-9388 ◊ [email protected] [email protected] Newsletter Editor–Matthew Lybanon 2019 Littlemore Drive. Memphis, TN 38016 ◊ (901) 757-2144 ◊ [email protected] Links to Federation News Webmaster–Mike Baldwin ➡ AFMS: www.amfed.org/afms_news.htm 367 North Main Street, Collierville, TN 38017 ◊ ➡ SFMS: www.amfed.org/sfms/ (901) 853-3603 ◊ [email protected] ➡ DMC: www.amfed.org/sfms/_dmc/dmc.htm Show Chairman–James Butchko 4220 Dunn, Memphis, TN 38111 ◊ (901) 743-0058 ◊ [email protected] APRIL 2015" PAGE 2 MEMPHIS ARCHAEOLOGICAL AND GEOLOGICAL SOCIETY MAGS Rockhound News ◊ A monthly newsletter for and by the members of MAGS referred to as the “kidneys of the all shape first, and then find spic- ocean” because they can pump ules under the microscope. No- large quantities of seawater remov- tice I wrote most. ing detritus. Most sponges are Enter Fabulous Tennessee Fos- sessile marine, meaning they at- sil Astraeospongia meniscu (Figure 1), tached to the sea floor or as epibi- arguably the most recognized fos- onts on another shell. As you sil sponge anywhere. Astraeo- might expect, their lack of a min- spongia literally means “star- eralized external skeleton, unlike sponge”, referring to the spicule that of corals, brachiopod, bi- shape visible on the surface, and valves, and other “higher” inverte- meniscus from the Greek for brates, severely hinders the likeli- Fabulous Tennessee “crescent” or saucer-shape. As- hood of sponges fossilizing, but all traeospongia, was named by Dr. Fossils is not lost! One group of cells Ferdinand von Roemer using Dr. Michael A. Gibson, University of within the walls of sponges does specimens from the “fossil glades” Tennessee at Martin secrete a mineralized hard part( of Hardin, Wayne, Perry, and De- spicules. Spicules are spike-like Astraeospongia meniscus catur counties in West Tennessee. calcite or silica skeletal secretions Roemer, 1854 Especially productive is the that adds some degree of rigidity Brownsport Formation ,where the Kingdom Animalia to the sponge and they can be soli- muddy limestone beds from which Phylum Porifera tary or fused into a framework, the sponge easily erodes were much like the framing of a build- Class Calcarea or Demospongia termed the “Meniscus Beds” due ing. The remainder of the sponge Order Heteroactinida to the abundance of sponges, and is soft tissue called spongin. later the Meniscus Limestone, by Family Astraeospongiidae Sponges readily decay upon death, Tennessee’s second State Geolo- Genus Astraeospongia so sponge spicules are common gist James Sa#ord in 1861. Indeed, Species meniscus microfossils, due to their abun- this sponge now has the exalted dance and very small size, but en- Sponges, or porifera ("pore status of being an Index or Guide tire sponges are relatively rare in Fossil for the Middle Silurian to bearer"), are generally considered the fossil record. The porous na- to be “lower invertebrates” of Middle Devonian in North Amer- ture of sponges can enhance their ica. Nearly every paleontology “cell-grade”, meaning they lack the fossilization by allowing mud to ability to form tissue that can be program and nearly all courses on infiltrate the ostia and osculum, Earth history use this as the dis- used to then form organs, so no followed by another generation of circulatory, respiratory, or muscu- tinctive sponge to study because mud entombing the entire animal. of its easily recognized curved lature systems like you and I have. What results is a special style of Sponges use five di#erent cell lens-shape and distinctive star-like preservation called a “cast-in-cast” pattern of large spicules. types to loosely assemble an or- in which two di#erent generations ganic structure consisting of a of mud fill open space and entomb Ferdinand von Roemer (Jan. 5, layer of amoeboid or flagellated the sponge, which subsequently 1818)Dec. 14, 1891; Figure 2) was cells that create currents to pull decays leaving on the overall born in Hanover, Germany, where food-laden water through their sponge shape (cup or ball usually) he developed a keen interest in soft sac-like body. Seawater enters impressions of other features. If geology, earning his Ph. D. in pale- through tiny pores (ostia), and af- spicules are present, then they can ontology in Berlin in 1842. Soon ter being filtered of food, the wa- be locked into place to make a after, in 1845-1847, Roemer settled ter exits through a larger opening copy of the sponge shape.
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