Expeditions organized or participated in by the Smithsonian . f. See text for by Bassler. valley but they are seldom so exposed that an instructive section canbe quarried out without injury to the specimens. A great reef ofcorals outcrops in the strata along- the banks of Chenoweth Creek atJefifersontown, near Louisville, Kentucky, and this was selected tofurnish an exhibit for the Aluseum. A section of the stratified rocks,6 feet by 10 feet, outlined in the accompanying photograph (fig. 26), NO. 17 SMITHSONIAN i:X , I916 23 was bodily (juarried ou
Expeditions organized or participated in by the Smithsonian . f. See text for by Bassler. valley but they are seldom so exposed that an instructive section canbe quarried out without injury to the specimens. A great reef ofcorals outcrops in the strata along- the banks of Chenoweth Creek atJefifersontown, near Louisville, Kentucky, and this was selected tofurnish an exhibit for the Aluseum. A section of the stratified rocks,6 feet by 10 feet, outlined in the accompanying photograph (fig. 26), NO. 17 SMITHSONIAN i:X , I916 23 was bodily (juarried out of the bank, and these strata with theircontained corals were later set up in the exhibition hall ofpaleontoloi^y. The lowest layer of hmestone (A) is composed largely of fossilbrachiopod shells. Next above is a layer with scattered corals (B)belonging- to a long-tubed species {Colniiinaria calicina Nicholson),probably torn by waves from a nearby coral reef. ( )verlying thisis a limestone stratum (C) largely made of the twiglike stems ofstony IJryozoa ( Trepostomata ).. Fig. 2J.—Trenton limestone outcrop near Lexington, Ky., with one stratumcontaining large heads of coral (A). Photograph by Bassler. The main reef of corals (D) is chiefly composed of the roundedheads of three species of honey-comb corals, some with radial parti-tions in the tubes (Columnaria alvcolata Goldfuss), others withoutsuch partitions (Columnaria vacua Foerste), and still others withspongy walls (Calapoecia crihriformis Nicholson). Large stems offluted or nodular Hydrozoa {Bcatricca) are scattered among thehoney-comb coral masses. Horn corals (Streptelasiiia ntsticiiiii Ijillings) are to be seen inboth the lower and upper coral beds. The spaces between the lime- 24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 66 stone layers and also between the heads of coral were filled withclay which contained many other examples of fossil life. Another coral reef in central Kentucky composed of a singlespecies (Stro
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1912
