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Moncrieff Bay
Moncrieff BayLocation in South Australia
Location	Kangaroo Island, South Australia
Coordinates	35°49′30″S 138°07′29″E / 35.824955°S 138.124668°E / -35.824955; 138.124668
Type	Bay
Etymology	Alexander Bain Moncrieff
Part of	Backstairs Passage
Basin countries	Australia
Designation	Marine park
Max. length	about 4.5 kilometres (2.8 mi)
Max. width	about 1.0 kilometre (0.62 mi)
Max. depth	about 7 metres (23 ft)

Moncrieff Bay is a bay in the Australian state of South Australia located at the east end of the Dudley Peninsula on Kangaroo Island in the gazetted locality of Willoughby overlooking Backstairs Passage about 106 kilometres (66 mi) south-west of the state capital of Adelaide and about 47 kilometres (29 mi) south-east of the municipal seat of Kingscote.

It was named in September 1908 after A. B. Moncrieff, the Engineer in Chief of the Department of Marine & Harbors. It was one of eleven places in South Australia so named at the time as part of an effort “to name some of the more prominent features on the coast of South Australia which had been left blank in the Admiralty and land charts…”

It consists of the section of coastline which faces east and runs in a north-south direction between the headlands of Cape St Albans in the north and Cape Willoughby in the south. It includes one inlet – Pink Bay. The coastline is described as “rugged” and as “predominantly composed of steep, 100 m high vegetated bluffs.” Water depths within the bay are less than 10 metres (33 ft) with a maximum depth of 7 metres (23 ft) shown as single sounding in an official source.

The bay’s coastline is described as being “boulder beaches’ with the exception of two beaches composed of sand at its southern end. The beach at Pink Bay in the west has a length of 40 metres (130 ft) while the other one known as 'Cape Willoughby' in the east has a length of 150 metres (490 ft). Both are unpatrolled swimming beaches which are considered by Surf Life Saving Australia to be respectively ‘least hazardous’ and ‘moderately hazardous’ while the "boulder beaches" being considered to be "extremely hazardous."

The bay’s bottom is described in 2002 by divers doing a fish population survey as consisting of “blocks (1-2 m) and boulders going to sand at 5 m depth” and there was a “rocky bottom at southern end of (the) bay 250 m each side of beach.” Also, the following algae genera and species were considered to be the dominant alga present in parts of the bay surveyed - genus Ecklonia, genus Cystophora represented by C.siliquosa, C.moniliformis, and C. intermedia, genus Acrocarpia and Sargassum fallax from the family Sargassaceae.

As of late 2012, the waters adjoining its shoreline are within a habitat protection zone in the protected area known as the Encounter Marine Park.

References

1. ^ "Search result for 'Moncrieff Bay, BAY' with the following datasets selected - 'Suburbs and Localities' and 'Gazetteer'". Location SA Map Viewer. Government of South Australia. Archived from the original on 12 October 2016. Retrieved 27 December 2017.
2. ^ South Australia. Department of Marine and Harbors (DMH) (1985), The Waters of South Australia a series of charts, sailing notes and coastal photographs, Dept. of Marine and Harbors, South Australia, p. chart 12, ISBN 978-0-7243-7603-2
3. "THE LATEST PLACE NAMING". The Register (Adelaide). Vol. LXXIII, no. 19, 297. South Australia. 17 September 1908. p. 6. Retrieved 27 December 2017 – via National Library of Australia.
4. "Search result for 'Pink Bay, Bay' with the following datasets selected - 'Suburbs and Localities' and 'Gazetteer'". Location SA Map Viewer. Government of South Australia. Retrieved 2 January 2018.
5. ^ "Pink Bay SA". Surf Life Saving Australia. Retrieved 1 January 2018.
6. "Cape Willoughby SA". Surf Life Saving Australia. Retrieved 1 January 2018.
7. Shepherd, Scoresby A.; Brook, James; Brown, Adrian. "A PRELIMINARY SURVEY OF THE WESTERN BLUE GROPER ON KANGAROO ISLAND" (PDF). Conservation Council of South Australia. p. 5. Retrieved 19 January 2018.
8. "Encounter Marine Park Management plan summary" (PDF). Department of Environment, Water and Natural Resources. p. 38 of 39. Retrieved 2 January 2018.

v t e Kangaroo Island
Major townships	American River Kingscote Parndana Penneshaw
Beaches	American Beach Baudin Beach Brown Beach D'Estrees Bay Emu Bay Island Beach Nepean Bay Vivonne Bay
Coastal features	Western end of island Cape Borda Cape du Couedic Cape Gantheaume D'Estrees Bay Fides Bluff Maupertuis Bay Nepean Bay Pelican Lagoon Point Marsden Ravine des Casoars Stokes Bay Vivonne Bay Dudley Peninsula Cape St Albans Cape Willoughby Kangaroo Head Moncrieff Bay Pink Bay
Protected areas	National parks Flinders Chase Conservation parks Baudin Beatrice Islet Beyeria Busby Islet Cape Gantheaume Cape Willoughby Cygnet Estuary Dudley Kelly Hill Lashmar Lathami Lesueur Mount Taylor Nepean Bay Parndana Pelican Lagoon Seal Bay Seddon Simpson Vivonne Bay Marine parks Encounter Western Kangaroo Island Southern Kangaroo Island Wilderness Protection Areas Cape Bouguer Cape Gantheaume Cape Torrens Ravine des Casoars Western River
Islands adjacent to Kangaroo Island coast	Beatrice Islets Busby Islet Casuarina Islets Douglas Rock Nobby Islet Paisley Islet Pelican Lagoon Islets Pelorus Islet
Related and uncategorised	2007 Kangaroo Island bushfires County of Carnarvon Fleurieu and Kangaroo Island Hundred of Dudley Kangaroo Island Council Kangaroo Island wine region Kingscote Airport Middle River Reservoir
Category Commons

• Bays of South Australia
• Dudley Peninsula
• Backstairs Passage