| 词条 | Shag Rock (Houtman Abrolhos) |
| 释义 |
| name = Shag Rock | image_name = | image_caption = | location = Indian Ocean, off the coast of Western Australia | coordinates = {{coord|28|28|33|S|113|42|44|E|display=inline,title|region:AU-WA_dim:2500_type:isle}} | archipelago = Houtman Abrolhos | area_ha = 0.1 | length_m = 50 | width_m = 20 | coastline_m = | highest_mount = | elevation_m = 3 | country = Australia | country_admin_divisions_title = State | country_admin_divisions = Western Australia | population = nil | additional_info = }} Shag Rock is a small rocky island in the Wallabi Group of the Houtman Abrolhos. GeographyIt is located at {{coord|28|28|33|S|113|42|44|E|display=inline}},[1][2] about {{convert|1.5|km|abbr=on|0}} east of West Wallabi Island.[3] Its nearest neighbour is Plover Island, about {{convert|700|m|abbr=on|0}} away. The island has an area of about {{convert|0.1|ha|abbr=on}}, and a maximum elevation of {{convert|3|m|abbr=on|0}}.[4] It is uninhabited, and devoid of human infrastructure. This island should not be confused with the rocky island that lies to the west of North Island. The latter has no gazetted name, but is informally known as "Shag Rock". Geology and physiographyShag Rock is essentially an outcrop of Wallabi Limestone, a dense calcretised, coral limestone platform that underlies the entire Wallabi Group. This platform, which arises abruptly from a flat shelf, is about {{convert|40|m|abbr=on|0}} thick, and is of Quaternary origin. Reef that formed during the Eemian Stage (about 125,000 years ago), when sea levels were higher than at present, are now emergent in places, and constitute the basement of the group's "central platform" islands, of which Shag Island is one.[4][5] Flora{{see also|Flora of the Houtman Abrolhos}}About half of the island, including most of its centre, is rock with no vegetation cover. A very small area just south of the centre is vegetated by Tecticornia halocnemoides (Shrubby Samphire). The remainder of the island, predominantly the northern third and a patch in the south west, is vegetated by Atriplex cinerea (Grey Saltbush), Nitraria billardierei (Nitre Bush) and Pittosporum phillyreoides (Weeping Pittosporum).[6] References1. ^Gazetteer of Australia (1996). Belconnen, ACT: Australian Surveying and Land Information Group. 2. ^{{Gazetteer of Australia | name = Shag Rock | id = 280455}} 3. ^Australia 1:100000 Topographic Survey, Map sheet 1641 (Edition 1): Wallabi 4. ^{{cite book | author1 = Collins, Lindsay B. | author2 = Zhu, Zhong Rong | author3 = Wyrwoll, Karl-Heinz | year = 1998 | chapter = Late Tertiary-Quaternary Geological Evolution of the Houtman Abrolhos Carbonate Platforms, Northern Perth Basin | editor = Purcell, R. | editor2 = Purcell, P. | title = The sedimentary basins of Western Australia | volume = 2 | pages = 647–663 | location = Perth, Western Australia | publisher = Petroleum Exploration Society of Australia | chapterurl = http://espace.lis.curtin.edu.au/archive/00000155/ | accessdate = 2008-05-02 | deadurl = yes | archiveurl = https://web.archive.org/web/20080722191741/http://espace.lis.curtin.edu.au/archive/00000155/ | archivedate = 2008-07-22 | df = }} 5. ^{{cite book |author1=Collins, Lindsay B. |author2=Zhu, Zhong Rong |author3=Wyrwoll, Karl-Heinz | year = 2004 | chapter = Geology of the Houtman Abrolhos Islands | pages = 811–834 | title = Geology and hydrogeology of carbonate islands (Developments in Sedimentology 54) | editor = Vacher, Leonard |editor2=Quinn, Terrence | publisher = Elsevier Science}} 6. ^1 {{cite journal | first = Judith M. | last = Harvey | year = 2001 | title = A flora and vegetation survey of the islands of the Houtman Abrolhos, Western Australia | journal = CALMScience | volume = 3 | issue = 4 | pages = 521–623}} Data also available in {{cite journal | author = McCrea, Jo (ed.) | title = Inventory of the Land Conservation Values of the Houtman Abrolhos Islands |date=October 2003 | edition = Fisheries Management Paper No. 151 |issn=0819-4327 | publisher = Department of Fisheries, Government of Western Australia | url = http://www.fish.wa.gov.au/docs/mp/mp151/index.php?0508 | accessdate = 2008-02-02}} 2 : Wallabi Group|Uninhabited islands of Australia |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。