{"id":836,"date":"2004-01-27T18:32:00","date_gmt":"2004-01-27T18:32:00","guid":{"rendered":"http:\/\/www.lingula.org.uk\/wordpress\/2004\/01\/27\/hmm-geology-or-marsiology\/"},"modified":"2004-01-27T18:32:00","modified_gmt":"2004-01-27T18:32:00","slug":"hmm-geology-or-marsiology","status":"publish","type":"post","link":"https:\/\/www.lingula.org.uk\/wordpress\/2004\/01\/27\/hmm-geology-or-marsiology\/","title":{"rendered":"Hmm.. geology or marsiology?"},"content":{"rendered":"

Anyway, whatever it is, it looks like the crater that Opportunity is in was excavated from sedimentry rock.<\/p>\n

In this<\/a> image, at the far right end there’s a block of the rock on show which looks like it has cross bedding<\/a>. Such things don’t happen in igneous rocks, only sedimentry ones. Now, this doesn’t mean that there is water on Mars. Cross bedding can be created in sediments which are sub-aerial, sand dunes, but they can also be generated in sub-aqueous environments, namely flowing water, sediment ripples.<\/p>\n

From the size of the bedding planes in this bedding it looks more like sub-aerial sand dune type deposits such as can be seen in the cliffs around Dawlish Warren<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Anyway, whatever it is, it looks like the crater that Opportunity is in was excavated from sedimentry rock. In this image, at the far right end there’s a block of the rock on show which looks like it has cross … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-836","post","type-post","status-publish","format-standard","hentry","category-random"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1Kvvs-du","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/posts\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/comments?post=836"}],"version-history":[{"count":0,"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/posts\/836\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/media?parent=836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/categories?post=836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lingula.org.uk\/wordpress\/wp-json\/wp\/v2\/tags?post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}