000			03880cam a2200481 i 4500
001			19324485
003			PUCPR
005			20250325133830.0
008			161003s2017 dcu b f00 0 eng
010			_a 2016045255
040			_aDGPO/DLC _beng _cDGPO _erda _dDLC
042			_apcc
043			_an-us-nm
049			_aBEV
050	0	0	_aQE989 _b.P53 2017
082	0	0	_a561/.11520978962 _223
086	0		_aSI 1.30:99
092			_223 _a561/.11520978962
100	1		_aDiMichele, William A. _9302100
245	0	0	_aPlant fossils from the Pennsylvanian-Permian Transition in western Pangea, Abo Pass, New Mexico / _cWilliam A. DiMichele [and four others].
264		1	_aWashington, D.C. : _bSmithsonian Institution Scholarly Press, _c2017.
300			_a40 pages : _bcolor illustrations, map ; _c28 cm.
336			_atext _btxt _2rdacontent
337			_aunmediated _bn _2rdamedia
338			_avolume _bnc _2rdacarrier
490	1		_aSmithsonian contributions to paleobiology, _x0081-0266 ; _vnumber 99
504			_aIncludes bibliographical references (pages 36-38) and index.
505			_aIntroduction -- Geology -- Methods of Analysis / A note on Conifer Taxonomy -- ABO Formation / Age and Depositional Environment ; Fossil Flora -- Base of Red Magdalena / Fossil Flora ; Age of Environmental Implications of the Flora -- Unit 8 / Fossil Flora ; Stratigraphic and Environmental Interpretations -- Unit 10 / Fossil Flora ; Stratigraphic and Environmental Interpretations -- Unit 35 / Fossil Flora ; Stratigraphic and Environmental Interpretations -- Discussion
520			_aPlant fossils are described from five stratigraphic levels in upper Paleozoic strata in Abo Canyon, New Mexico. The fossils were collected by Charles B. Read, of the U.S. Geological Survey, in 1940 and 1941, and span the Pennsylvanian-Permian boundary. Read's original field notes have not been located. However, a combination of his pattern of bed numbering, notes written by Read and enclosed with the collections, and the taxonomic composition of the floras permit them to be placed with confidence in a sequence from oldest to youngest. The youngest fossils, which securely anchor the entire collection stratigraphically, are from the Abo Formation and are of early Permian age. A collection labeled "Base of Red Magdalena" is most likely from what today would be termed the Bursum Formation, thus immediately below the Abo. The three remaining collections are from the Pennsylvanian-aged Atrasado Formation, probably the Upper Pennsylvanian portion, extending as far back as the Missourian. The collections record a trend of increased seasonality of moisture (likely rainfall) through time. They are all either dominated or co-dominated by plants typical of environments with seasonal moisture stress. Conifers, Sphenopteris germanica and mixoneurid odontopterids are common to abundant in the collections older than the Abo Formation. All of the assemblages from below the Abo Formation also contain some taxa that required wet substrates for most of the year, particularly calamitaleans and marattialean tree ferns; the oldest collection also contains evidence of arborescent lycopsids.- -
650		0	_aPlants, Fossil _zNew Mexico.
650		0	_aPaleobotany _yPennsylvanian.
650		0	_aPaleobotany _zNew Mexico _yPaleozoic.
650		0	_aPaleobiology _zNew Mexico.
650		0	_aGeology, Stratigraphic _yPermian.
650		0	_aGeology, Stratigraphic _yPaleozoic.
700	1		_aLucas, Spencer G. _9302101
700	1		_aKerp, Hans _9302102
710	2		_aSmithsonian Institution Scholarly Press, _epublisher.
830		0	_aSmithsonian contributions to paleobiology ; _vno. 99.
906			_a7 _bcbc _corignew _d1 _eecip _f20 _gy-gencatlg
942			_2sudocs _c21
999			_c304038 _d304038