منابع مشابه
Fossil Plants of the Group Cycadofilices
filices " embraces a number of Paleozoic generic types combining structural characters of the ferns and of the gymnosperms. As originally established by Potonie 1 it was confined chiefly to genera founded on petrified trunks, petioles, and roots, with the provisional reference of several frond types. Subsequent research has established the correlation of the fronds of several of the members, an...
متن کاملPhylogenetic Analysis and Fossil Plants
Stein Jr., W.E., 1987. Phylogenetic analysis and fossil plants. Rev. Palaeobot. Palynol., 50:31 61. This paper presents a perspective on the relat ionship between cladistic methods and the study of fossil plants. Paleobotany has been slow in evaluat ing the potent ial of these and other explicit methods compared to other branches of systematics. However, the unique or part icular ly difficult p...
متن کاملComparative Assessments of Fossil Fuel Power Plants
Studies of CO2 capture and storage (CCS) costs necessarily employ a host of technical and economic assumptions regarding the particular technology or system of interest, including details regarding the capture technology design, the power plant or gas stream treated, and the methods of CO2 transport and storage. Because the specific assumptions employed can dramatically affect the results of an...
متن کاملThe Compact Group–fossil Group Connection: Observations of a Massive Compact Group at Z=0.22
It has been suggested that fossil groups could be the canibalized remains of compact groups, that lost energy through tidal friction. However, in the nearby universe, compact groups which are close to the merging phase and display a wealth of interacting features (such as HCG 31 and HCG 79) have very low velocity dispersions and poor neighborhoods, unlike the massive, cluster-like fossil groups...
متن کاملSome Fossil Plants of Early Devonian Type from the Walhalla
S of the PAPERS printed in the PHILOSOPHICAL TRANSACTIONS of the ROYAL SOCIETY of LONDON. Yols. 1 to 6 (1800-1854), 8vo, at 10s. each. (Vola. 3, 4 and 6 out of Print.) PROCEEDINGS of the ROYAL SOCIETY of LONDON, being a continuation of the foregoing Series. Vols. 8 to 14, and 16 to 74, 21s. each, cloth. Yol. 75 is composed of Obituary Notices of Fellows Deceased, 1898-1904. Price 15s. With Vol....
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ژورنال
عنوان ژورنال: Nature
سال: 1917
ISSN: 0028-0836,1476-4687
DOI: 10.1038/099073a0