rising and falling sealevels may not totally destroy barrier systems. The 

 sealevel history at Leschenault Peninsula also is at variance with studies of 

 accretionary sequences elsewhere along the southwestern Australian coast and 

 suggests very localized tectonic influences, a factor not fully explored in 

 Holocene sequences of the Perth Basin. (Author). 



321 SEMENIUK, V., and SEARLE, D. J. 1986. "Variability of Holocene Sea- 

 Level History Along the Southwestern Coast of Australia - Evidence for the 

 Effect of Significant Local Tectonism," Marine Geology . Vol 72, pp 47-58. 



Holocene sea- level records for the interval 7,400 '''C years B.P. to the 

 present were determined from accretionary sequences at three separate locali- 

 ties within the Perth Basin of southwestern Australia. The three records all 

 differ dramatically despite an overall separation of sites of only 170 km. At 

 the northernmost site the record shows sealevel was ca. 1.0 m below present 

 MSL 7,415 '"C years B.P. and that it gradually rose to reach its present 

 position ca. 5,100 '""C years B.P. with no evidence for a raised sealevel nor 

 for significant oscillations. the record at the middle site shows a steadily 

 declining sealevel from an initial high of ca. 2.5 m at 6,400 '''C years B.P., 

 and is consistent with eustatic-hydroisostatic interpretations. The 

 southernmost site shows the most complex sealevel history of the three with a 

 still-stand at 2 or 3 m below present between 7,000 and 5,500 '"C years B.P., 

 an abrupt rise to 3 or 4 m above present MSL between 4,800 and 3,800 '''C years 

 B.P., followed by a decline with sealevel reaching its present position ca. 

 2800 '■'C years B.P. 



Considered jointly the three differing sealevel records imply signifi- 

 cant local tectonism during the Holocene along the southwestern coast of 

 Australia. The data further indicate that this coast can no longer be consid- 

 ered as tectonically stable as previously assumed and consequently the sea- 

 level evidence can no longer be considered to reflect only eustatic and 

 eustatic-hydroisostatic influences. (Authors). 



322 SEYMOUR, R. J., STRANGE, R. R. , CAYAN, D. R. , and NATHAN, R. A. 1985. 

 "Influence of El Ninos on California's Wave Climate," Proceedings of the 19th 

 Coastal Engineering Conference , pp 557-592. 



Waves with exceptional height and periods caused severe damage along the 

 coast of California in 1982-83. Because these large wave events coincided 

 with a strong El Nino-Southern Oscillation (ENSO) climatic anomaly, which 

 occurs 20-25 times per century, there was interest in determining if the ex- 

 treme waves resulted from the ENSO or its related features. the meteorologi- 

 cal setting featured a very large and intense low pressure zone over the 

 north-central Pacific. Associated with this Pacific-wide pattern, a series of 

 large mid- latitude storms developed at about weekly intervals and produced ex- 

 ceptionally long fetches directed at the California Coast. 



Two time series of extreme wave events, using buoy data after 1981 and 

 hindcasts before, were used covering the period from 1900 to 1984. One series 

 considered waves with significant heights greater than 3 m (10 ft) and the 

 second for those greater than 6 m (20 ft) . These were compared with a time 



149 



