[1] (1)汪长庆等,1980,北京十三陵的震旦亚界,《中国震旦亚界》,天津科学技术出版社。

(2)宋天锐、高健,1983,北京十三陵上前寒武系的潮汐沉积构造,《国际晚前寒武纪地质讨论会( IGLP >,论文摘要汇编,中国地质科学院,天津。

(3)张昀,1978,十三亿年前的单细胞真核生物,科学通报4期。

(4)沙庆安、潘正莆,1981,天津蓟县晚前寒武系雾迷山组硅化叠层石中有机质的形态特征与“藻

细胞”问题,中国古生物学会第十二届学术年会论文选集,科学出版社。

(5)尹磊明,1981,河北曲阳地区震旦系高于庄组的微体化石和假化石,古生物学报,20卷,3期。

(6)宋天锐,1983,广东曲红一仁化地区晚二叠世地层的沉积相和元素变化,地球化学,第1期。

(7)朱海之,1982,古地震活动若干标志的研究,史前地震与第四纪地质文集,陕西科学技术出版。

(8)裴蒂庄著李汉瑜等译,1981,沉积岩,石油工业出版社。

(9) Alpert,S.P.,1977, Trace fossils and the basal Cambrian boundary,in Trace fossils 2, Edited by T.P. Crimes and J.C. Harper, Seell Hause press.Liverpool.

(10) Banks,N.L.,1970.Trace fossils from the Late Precambrian and Lower Cambrian of Finnmark Norway,in Trace fossils, Geol.J. Spec.fissure 3. Edited by T.P. Crimes and J.C.Harper. Seel House Press, Liverpool.

(11) Byers, C W.,1982. Geological significance of marine biogenic sedimentary structures, in Animal-sediment Relation (Topics in Geobiology,Series Edition by F .G. Stebli,University of Florida).Edited by Peter, L.,Mccall and Michael J. S .Tevesz;Plenum Press, New York and London.

(12) Clemmey, H.,1976.World's oldest animal trace, Nature 261:576-578.

(13) Cloud, P.E.Jr.1968.Pre-metazoan evolution and the origins of the matazoan, in Evolution and Environment (E .T.Brake, ed.).Yale University Press,New Haven.

(14)Cloud, P.,1983. Are the Medicine Peak Quartzite "dubiofossils" fluid-evasion tracks? Geology (boulder), V of.11 No.10,

(15)Conybeare, C.E.B.and Crook, K.A.W .,1968.Manual of sedimentary structures. Bur. Min. Res. Geol. Geophys. Australia, Canberra.

(16)Friedman, G.M.,and Sanders, J.E.,1978.Principles of Sedim entology,John Wiley and Sons, New York, Chichester Brisbane,Toronto.

(17) Glaessner, M.F.,1969. Trace fossils from the Precambrian and basal Cambrian, Lethaia, 2.

(18)Kauffman E.G.and Steidtmann,J.R.,1976.Are these the oldest metazoan

trace fossils? Geol. Soc.,Am. Abstr.8.

(19)Kauffman E.G. and Steidtmann, J.R.,1981.Are these the oldest metazoan trace fossils= Journal of Paleotologp, V.55.

(20)Kauffman E.G. and Steidtmaan, J.R.,1983. No, they are still dubiofossils. G eology (boulder), V of.11,No.10,

(21)Lowe, D.R.,1975.W ater escape structures in coarsegrained sedim ents" Sedimentology,V 22.

(22)Pettijiohn, F.J.,and Potter, P.E.,1964.Atlas and Glossary of Primary Sedimentary Structures. Springer-Verlag (Berlin, Heidelberg, New York).

(23)Palij, V.M.,1974. On fiading of the trace fossil in Riphean deposits of the Ovruch Ridge, Rep. Acad.Sci. Ukr.SSR.Ser. B Geol.Geophs. Chem.Biol.

(24) Plint,A.G.,1983.Liquefication,fluidization,and erosional structures associated with bituminous sands of the Bracklesham Formation(Middle Eocene) of Dorset, E ngland, Sedim antology, vo1.30, No.4.

(25)Reineck H.E.,Singh,I.B.,1973. Depositional Sedimentary Environments: New York-Heidelberg-Berlin,Springer-Verlag.

(26)Schopf, J.W.,1975. Precambrian Paleobiolgy:Problems and Perspectives. Annu.Rev. Earth and Plant Sci,3.

(27)Walcott, C.D.,1899. Pre-Cambrian fossiliferous formations:Geol.Soc. Am.Bull. 10.

(28)Walter, M,R.,Oehler, J.H.,and Oehler, D.Z.,1976.Megascopic algae 1300 millioa years old from the Belt Supergroup Montana; A reinterpretation of Walcott's Helminthoidichnites, J. Paleotol.50.