00000nam 2200000za 4500 9.848691 CaOODSP 20231107102809 cr ||||||||||| 171213s2018 oncab ob f000 0 eng d 978-0-660-24242-2 CaOODSP eng eng fre n-cn-bc M44-2018/1E-PDF Distribution of hexactinellid sponge reefs in the Chatham Sound region, British Columbia [electronic resource] / J. Shaw ... [et al.]. [Ottawa] : Natural Resources Canada, 2018. 14 p. : ill. (some col.), col. maps. Current research, 1701-4387 ; 2018-1 This record does not include an errata slip. Complete data set with all files in various formats available for free download at http://geoscan.nrcan.gc.ca/. Includes bibliographical references. "Systematic mapping of the Chatham Sound region, British Columbia, shows that hexactinellid sponge reefs are a significant component of the seafloor mosaic. Based on the three criteria for reef identification (positive relief, low backscatter strength, and acoustic transparency) it is shown that the total reef area is 48 km2. The largest cluster of identified reefs is located within Chatham Sound sensu stricto and covers more than 27 km2 of seafloor in water depths of 35-170 m. It includes reefs up to 25 m high and is designated the Chatham Sound reef complex. The authors describe some of the wide range of morphologies in this reef complex and the nearby reefs”--Abstract, p. 1. Includes abstract in French. gccst Ocean floor gccst Geomorphology Hexactinellida Reefs Shaw, J. (John), 1946- Canada. Natural Resources Canada. Geological Survey of Canada. Current research (Geological Survey of Canada) 1701-4387 ; 2018-1. (CaOODSP)9.506236 PDF 11.62 MB https://publications.gc.ca/collections/collection_2018/rncan-nrcan/M44-2018-1-eng.pdf 306310