45 records matched your query       

04394aam a2200649 a 4500
001 D16CB64C214411EEBC7340321FECA4DB
003 SILO
005 20230713010558
008 810724s1982    dcua     b   f000 0 eng  
010    $a 81607852
035    $a (OCoLC)7737299
040    $a DLC $b eng $c DLC $d GPO $d NLGGC $d BTCTA $d DEBBG $d ZWZ $d OCLCO $d OCLCF $d OCLCQ $d OCLCA $d OCLCQ $d TYC $d HUELT $d OCLCO $d W2U $d OCLCQ $d OCLCO $d CBA $d OCLCO $d BUF $d OCLCQ $d OCLCO $d CSB $d SILO
043    $a n-us-va
050 00 $a QE701 $b .S56 no. 49
074    $a 910-G (microfiche)
082 00 $a 561/.13 $a 561/.13 $2 19
084    $a TF 9150 $2 rvk
086 0  $a SI 1.30:49
100 1  $a Hueber, Francis M.
245 10 $a Megaspores and a palynomorph from the lower Potomac Group in Virginia / $c Francis M. Hueber.
260    $a Washington : $b Smithsonian Institution Press, $c 1982.
300    $a iii, 69 pages : $b illustrations ; $c 26 cm
490 1  $a Smithsonian contributions to paleobiology ; $v no. 49
504    $a Includes bibliographical references (pages 19-20).
520 3  $a A plant microfossil assemblage comprising seven species of megaspores; Verrutriletes carbunculus (Dijkstra) Potoni, Echitriletes cf. E. lanatus (Dijkstra) Potoni, Erlansonisporites erlansonii (Miner) Potoni, Thylakosporites retiarius (Hughes) Potoni, Arcellites disciformis (Miner) Ellis and Tschudy, Arcellites cf. A. pyriformis (Dijkstra) Potter, and Paxillitriletes species Hall and Nicolson; two species of the microspore Crybelosporites Dettmann, C. striatus (Cookson and Dettmann) Dettmann adherent to specimens of Arcellites disciformis, and Crybelosporites species adherent to specimens of Echitriletes cf. E. lanatus; and the palynomorph Dictyothylakos pesslerae Horst; is recorded from the Patuxent Formation, Potomac Group, Lower Cretaceous (Barremian-Aptian) in Virginia, USA. A preliminary analysis of the enclosing matrix for microspores and pollen has related the collection site closely to lowermost Zone I of the Potomac Group as described by Hickey and Doyle (1977). The megaspore assemblage supported by acceptance of the oldest possible date derived from the microspore and pollen analysis suggests correlation with the Barremian-Aptian horizons in the English Wealden, Lower Cretaceous, and specifically with the Arcellites Flora of Hughes. Megafossils comprising two seed cones belonging to the Pinaceae, Pityostrobus hueberi Robison and Miller and Pityostrobus virginiana Robison and Miller have been reported from the site. A fruit or cupule of Caytonia has been found along with numerous seeds, fern fragments, coniferous woods, and cycadopsid cuticles. This array of megafossils is not described or illustrated herein. A backswamp area of sedimentation and type of habitat is suggested on the basis of the lithofacies and generalized composition of the flora. The writer fully agrees with Tschudy (1976) as to the importance of searching for megaspores in continental Mesozoic rocks to aid in correlating and subdividing the deposits more effectively.
650  0 $a Plant spores, Fossil $z Virginia.
650  0 $a Palynology.
650  0 $a Paleobotany $y Cretaceous.
650  0 $a Paleobotany $z Virginia.
650  6 $a Spores fossiles (Botanique) $z Virginie.
650  6 $a Palynologie.
650  6 $a Paléobotanique $y Crétacé.
650  6 $a Paléobotanique $z Virginie.
650  7 $a palynology. $2 aat
650  7 $a Cretaceous Geologic Period. $2 fast $0 (OCoLC)fst01352648
650  7 $a Paleobotany. $2 fast $0 (OCoLC)fst01051324
650  7 $a Palynology. $2 fast $0 (OCoLC)fst01051826
650  7 $a Plant spores, Fossil. $2 fast $0 (OCoLC)fst01716029
651  7 $a Virginia. $2 fast $0 (OCoLC)fst01204597
650  7 $a Makrospore $2 gnd
650  7 $a Unterkreide $2 gnd
651  7 $a Virginia $2 gnd
650 17 $a Palynologie. $2 gtt
650 17 $a Krijt (geologisch tijdvak) $2 gtt
650  7 $a Spores fossiles. $2 ram
651  7 $a Virginia. $2 swd
650  0 $a Spores (Botany), Fossil.
650  0 $a Palynology.
650  0 $a Paleobotany $y Cretaceous.
650  0 $a Paleobotany $z Virginia.
648  7 $a From 65 to 140 million years ago $2 fast
710 2  $a Smithsonian Institution.
830  0 $a Smithsonian contributions to paleobiology ; $v no. 49.
941    $a 1
952    $l PLAX964 $d 20230718043932.0
956    $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=D16CB64C214411EEBC7340321FECA4DB
994    $a 92 $b IOH