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- Petrosphere abstract "In archaeology, a petrosphere (from Greek πέτρα (petra), \"stone\", and σφαῖρα (sphaira), \"ball\") is the name for any spherical man-made object of any size that is composed of stone. These mainly prehistoric artifacts may have been created and/or selected, but altered in some way to perform their specific function, including carving and painting.Several classes of petrospheres exist, such as the stone spheres of Costa Rica; painted pebbles from Scotland; stone charms from Scotland; sandstone balls from such sites as Traprain Law; the Carved Stone Balls, which are mainly from Scotland, although they have also been found in Cumbria and Ireland; and carved stone shot for cannons and trebuchets.Naturally formed stone balls, such as concretions and spherulites, have been at times misidentified as petrospheres. For example, fringe archaeologists and advocates of prehistoric extraterrestrial visitors have repeatedly argued that the stone balls, which range in diameter from 0.61 to 3.35 m, found around Cerro Piedras Bola in the Sierra de Ameca, between Ahualulco de Mercado and Ameca, in Jalisco, Mexico, are petrospheres. However, these natural stone balls are megaspherulites that have been released by erosion from a 20- to 30-million-year-old ash flow tuff, which originally enclosed them and in which they formed. The proponents of these stone balls being petrospheres base their arguments on the false claims that all of these spheres are perfectly round, they are composed of granite, and natural processes cannot produce stone balls. Similarly, cannonball concretions, i.e. those found along the Cannonball River in North Dakota and near Moeraki, South Island, New Zealand, also have been misidentified as petrospheres.".
- Petrosphere thumbnail Petrosphere.jpg?width=300.
- Petrosphere wikiPageExternalLink article.php?sid=147.
- Petrosphere wikiPageExternalLink 4_211_224.pdf.
- Petrosphere wikiPageExternalLink smooth4.htm.
- Petrosphere wikiPageExternalLink balls.
- Petrosphere wikiPageExternalLink index.php?page=topic&topic=ball,..carved..stone&case=n06&first=7&last=18&roomlocation=ng.
- Petrosphere wikiPageExternalLink objects.shtml.
- Petrosphere wikiPageID "11189631".
- Petrosphere wikiPageLength "3813".
- Petrosphere wikiPageOutDegree "33".
- Petrosphere wikiPageRevisionID "675747108".
- Petrosphere wikiPageWikiLink Ancient_Greek.
- Petrosphere wikiPageWikiLink Bolas.
- Petrosphere wikiPageWikiLink Cannonball_River.
- Petrosphere wikiPageWikiLink Carved_Stone_Balls.
- Petrosphere wikiPageWikiLink Category:Archaeological_artefact_types.
- Petrosphere wikiPageWikiLink Category:Lithics.
- Petrosphere wikiPageWikiLink Category:Prehistoric_art.
- Petrosphere wikiPageWikiLink Category:Rock_art.
- Petrosphere wikiPageWikiLink Concretion.
- Petrosphere wikiPageWikiLink Cumbria.
- Petrosphere wikiPageWikiLink Grave_orb.
- Petrosphere wikiPageWikiLink Ireland.
- Petrosphere wikiPageWikiLink Kugel_ball.
- Petrosphere wikiPageWikiLink Lapidary.
- Petrosphere wikiPageWikiLink Moeraki.
- Petrosphere wikiPageWikiLink North_Dakota.
- Petrosphere wikiPageWikiLink Painted_pebbles.
- Petrosphere wikiPageWikiLink Rai_stones.
- Petrosphere wikiPageWikiLink Round_shot.
- Petrosphere wikiPageWikiLink Scotland.
- Petrosphere wikiPageWikiLink South_Island.
- Petrosphere wikiPageWikiLink Spherulite.
- Petrosphere wikiPageWikiLink Stone_ball.
- Petrosphere wikiPageWikiLink Stone_spheres_of_Costa_Rica.
- Petrosphere wikiPageWikiLink Stone_tool.
- Petrosphere wikiPageWikiLink Traprain_Law.
- Petrosphere wikiPageWikiLink Trebuchet.
- Petrosphere wikiPageWikiLink Wikibooks:A_Researchers_Guide_to_Local_History_Terminology.
- Petrosphere wikiPageWikiLink File:Petrosphere.jpg.
- Petrosphere wikiPageWikiLinkText "Petrosphere".
- Petrosphere wikiPageWikiLinkText "carved stone balls".
- Petrosphere wikiPageWikiLinkText "petrosphere".
- Petrosphere wikiPageUsesTemplate Template:Reflist.
- Petrosphere wikiPageUsesTemplate Template:Wikibooks.
- Petrosphere subject Category:Archaeological_artefact_types.
- Petrosphere subject Category:Lithics.
- Petrosphere subject Category:Prehistoric_art.
- Petrosphere subject Category:Rock_art.
- Petrosphere hypernym Name.
- Petrosphere type Type.
- Petrosphere type Artifact.
- Petrosphere type Lithic.
- Petrosphere type Tool.
- Petrosphere type Type.
- Petrosphere comment "In archaeology, a petrosphere (from Greek πέτρα (petra), \"stone\", and σφαῖρα (sphaira), \"ball\") is the name for any spherical man-made object of any size that is composed of stone.".
- Petrosphere label "Petrosphere".
- Petrosphere sameAs Q3412091.
- Petrosphere sameAs Petroesfera.
- Petrosphere sameAs Pétrosphère.
- Petrosphere sameAs m.02r32gb.
- Petrosphere sameAs Q3412091.
- Petrosphere wasDerivedFrom Petrosphere?oldid=675747108.
- Petrosphere depiction Petrosphere.jpg.
- Petrosphere isPrimaryTopicOf Petrosphere.