{"id":929,"date":"2019-01-29T14:49:57","date_gmt":"2019-01-29T13:49:57","guid":{"rendered":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/?page_id=929"},"modified":"2019-04-28T17:35:23","modified_gmt":"2019-04-28T15:35:23","slug":"47-laquifere-perche-de-puymirol","status":"publish","type":"page","link":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/47-laquifere-perche-de-puymirol\/","title":{"rendered":"47 &#8211; L\u2019aquif\u00e8re perch\u00e9 de Puymirol"},"content":{"rendered":"<table style=\"height: 60px\" width=\"100%\">\n<tbody>\n<tr>\n<td style=\"text-align: center\" colspan=\"2\" width=\"412\"><span style=\"color: #00ccff\"><a style=\"color: #00ccff\" href=\"http:\/\/u.osmfr.org\/m\/227985\/\"><strong>Coordonn\u00e9es GPS de l&#8217;aire de stationnement<\/strong><\/a><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\" width=\"206\"><span style=\"color: #000000\">44.187153<\/span><\/td>\n<td style=\"text-align: center\" width=\"206\"><span style=\"color: #000000\">0.789618 <\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure id=\"attachment_932\" aria-describedby=\"caption-attachment-932\" style=\"width: 646px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcartegeol.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-932\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcartegeol.jpg\" alt=\"\" width=\"646\" height=\"386\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcartegeol.jpg 646w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcartegeol-300x179.jpg 300w\" sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><\/a><figcaption id=\"caption-attachment-932\" class=\"wp-caption-text\">Carte g\u00e9ologique au 1\/50 000 de Valence d\u2019Agen<\/figcaption><\/figure>\n<p><span style=\"color: #000000\"><strong><u>Description du site<\/u> :<\/strong><\/span><\/p>\n<ul>\n<li><strong><span style=\"color: #000000\">Situation<\/span><\/strong><\/li>\n<\/ul>\n<p><span style=\"color: #000000\">La ville de Puymirol est construite sur un plateau calcaire culminant \u00e0 158m d\u2019altitude. Il s\u2019agit d\u2019une ancienne cit\u00e9 m\u00e9di\u00e9vale ayant fait l\u2019objet de fortifications dont il subsiste quelques vestiges situ\u00e9s sur le pourtour de la ville. Le karst sur lequel est b\u00e2ti cette ville est constitu\u00e9 de calcaire blanc lacustre de l\u2019Agenais (m1<em>Ab<\/em> sur la<\/span> <a href=\"http:\/\/ficheinfoterre.brgm.fr\/Notices\/0903N.pdf\">carte de VALENCE D\u2019AGEN n\u00b0903<\/a><span style=\"color: #000000\">) reposant sur une assise plus ou moins imperm\u00e9able de molasses de l\u2019Agenais (g1Ai et g1As de la<\/span> <a href=\"http:\/\/ficheinfoterre.brgm.fr\/Notices\/0903N.pdf\">carte de VALENCE D\u2019AGEN n\u00b0903<\/a><span style=\"color: #000000\">).<\/span><\/p>\n<ul>\n<li><strong><span style=\"color: #000000\">Points d&#8217;int\u00e9r\u00eat<\/span><\/strong><\/li>\n<\/ul>\n<p><span style=\"color: #000000\">Le circuit propos\u00e9 s\u2019effectue \u00e0 pied (sans difficult\u00e9 majeure), en contrebas des fortifications reposant \u00e0 la verticale des falaises calcaires. Il est important de rappeler aux \u00e9l\u00e8ves le respect des consignes de s\u00e9curit\u00e9 et notamment de ne pas longer les rochers et les remparts \u00e0 l\u2019aplomb. Ce circuit permet, en faisant le tour complet du plateau de Puymirol (2km environ), de rendre compte :<\/span><\/p>\n<p style=\"padding-left: 60px\"><span style=\"color: #000000\">&#8211; <span style=\"text-decoration: underline\">de sa situation &#8220;perch\u00e9e&#8221;<\/span> :<\/span><\/p>\n<figure id=\"attachment_933\" aria-describedby=\"caption-attachment-933\" style=\"width: 945px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-933\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol01.jpg\" alt=\"\" width=\"945\" height=\"390\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol01.jpg 945w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol01-300x124.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol01-768x317.jpg 768w\" sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/a><figcaption id=\"caption-attachment-933\" class=\"wp-caption-text\">Panorama du village de Puymirol dominant la vall\u00e9e de la S\u00e9oune depuis la D16 (44\u00b010&#8217;53.8&#8243;N 0\u00b046&#8217;49.0&#8243;E croix verte sur la carte)<\/figcaption><\/figure>\n<figure id=\"attachment_934\" aria-describedby=\"caption-attachment-934\" style=\"width: 945px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol02.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-934\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol02.jpg\" alt=\"\" width=\"945\" height=\"468\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol02.jpg 945w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol02-300x150.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol02-768x380.jpg 768w\" sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/a><figcaption id=\"caption-attachment-934\" class=\"wp-caption-text\">Aspect g\u00e9n\u00e9ral du chemin du ronde au pied des remparts (point 1)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\">Si le parcours permet de constater que les remparts se dressent \u00e0 l\u2019aplomb de la falaise, il est important de noter qu\u2019ils n\u2019ont pas \u00e9t\u00e9 construits dans ces conditions. Le chemin de ronde a en effet \u00e9t\u00e9 am\u00e9nag\u00e9 apr\u00e8s la r\u00e9volution fran\u00e7aise et le calcaire a \u00e9t\u00e9 exploit\u00e9 au 19<sup>i\u00e8me<\/sup> si\u00e8cle jusqu\u2019\u00e0 atteindre le pied des remparts.<\/span><\/p>\n<figure id=\"attachment_935\" aria-describedby=\"caption-attachment-935\" style=\"width: 1091px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-935\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03.jpg\" alt=\"\" width=\"1091\" height=\"886\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03.jpg 1091w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03-300x244.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03-768x624.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol03-1024x832.jpg 1024w\" sizes=\"auto, (max-width: 1091px) 100vw, 1091px\" \/><\/a><figcaption id=\"caption-attachment-935\" class=\"wp-caption-text\">Aspect de la falaise calcaire et d\u00e9tail des stries sur la roche (point 2)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\">La plan\u00e9it\u00e9 de la falaise par endroits ainsi que des stries laiss\u00e9es par l\u2019utilisation d\u2019outils d\u2019extraction sur la roche t\u00e9moignent de cette exploitation pass\u00e9e.<\/span><\/p>\n<p><span style=\"color: #000000\">Ce calcaire d\u00e9nomm\u00e9 calcaire blanc de l\u2019Agenais est un calcaire blanc lacustre micritique d\u2019une \u00e9paisseur de 5 \u00e0 15m. Form\u00e9 sur une p\u00e9riode allant de l\u2019Oligoc\u00e8ne au Stampien sup\u00e9rieur, ce calcaire r\u00e9sulte de la diagen\u00e8se de boues carbonat\u00e9es d\u00e9pos\u00e9es en abondance, du fait d\u2019un climat chaud, dans un bassin ferm\u00e9 non reli\u00e9 \u00e0 la mer. Si ce calcaire comporte quelques pass\u00e9es marno-calcaires \u00e0 nodules carbonat\u00e9s indur\u00e9s, il est essentiellement compos\u00e9 de carbonate blanc \u00e0 beige et comporte de nombreuses vacuoles. Ces derni\u00e8res sont issues du pi\u00e9geage, dans le s\u00e9diment encore meuble, de bulles de gaz r\u00e9sultant de l\u2019intense activit\u00e9 m\u00e9tabolique algo-bact\u00e9rienne. Aucun fossile ne semble se trouver sur le site.<\/span><\/p>\n<figure id=\"attachment_936\" aria-describedby=\"caption-attachment-936\" style=\"width: 1088px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-936\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04.jpg\" alt=\"\" width=\"1088\" height=\"530\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04.jpg 1088w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04-300x146.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04-768x374.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol04-1024x499.jpg 1024w\" sizes=\"auto, (max-width: 1088px) 100vw, 1088px\" \/><\/a><figcaption id=\"caption-attachment-936\" class=\"wp-caption-text\">D\u00e9tail du calcaire blanc de l\u2019Agenais : marno-calcaire \u00e0 nodules carbonat\u00e9s indur\u00e9s (\u00e0 gauche) et carbonate blanc dur vacuolaire (\u00e0 droite) (point 3)<\/figcaption><\/figure>\n<p style=\"padding-left: 60px\"><span style=\"color: #000000\">&#8211; <span style=\"text-decoration: underline\">de sa nature aquif\u00e8re<\/span> :<\/span><\/p>\n<p><span style=\"color: #000000\">La pr\u00e9sence de nombreuses vacuoles coupl\u00e9e \u00e0 la karstification du plateau conf\u00e8re \u00e0 ce calcaire une certaine porosit\u00e9 lui permettant de constituer un aquif\u00e8re. En outre, le caract\u00e8re imperm\u00e9able des molasses de l\u2019Agenais sur lesquelles est assis le calcaire observable \u00e0 Puymirol contribue \u00e0 l\u2019apparition de sources (exsurgence d\u2019eau de pluie) \u00e0 la base du plateau qui ont fait l\u2019objet d\u2019am\u00e9nagements. Trois puits sont par ailleurs encore observables au c\u0153ur du village.<\/span><\/p>\n<figure id=\"attachment_937\" aria-describedby=\"caption-attachment-937\" style=\"width: 1345px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-937\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05.jpg\" alt=\"\" width=\"1345\" height=\"1112\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05.jpg 1345w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05-300x248.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05-768x635.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol05-1024x847.jpg 1024w\" sizes=\"auto, (max-width: 1345px) 100vw, 1345px\" \/><\/a><figcaption id=\"caption-attachment-937\" class=\"wp-caption-text\">Lavoir du Rajol au point 4 (A), fontaine de la Comtal au point 5 (B), puits sans nom au point 6 (C), lavoir Saint-Seurin au point 7 (D), puits communal est au point 8 (E)<\/figcaption><\/figure>\n<p style=\"padding-left: 60px\"><span style=\"color: #000000\">&#8211; <u>du processus de karstification actuelle \u00e0 l\u2019origine du risque de chute de blocs et d\u2019\u00e9boulements<\/u>&nbsp;:<\/span><\/p>\n<p><span style=\"color: #000000\">Sa porosit\u00e9 et son caract\u00e8re perch\u00e9 ont soumis le calcaire de l\u2019Agenais \u00e0 une importante karstification. L\u2019eau, par son action acide, a conduit \u00e0 la dissolution des carbonates et \u00e0 l\u2019apparition d\u2019un limon argileux (non soluble) initialement noy\u00e9 dans le calcaire.<\/span><\/p>\n<figure id=\"attachment_938\" aria-describedby=\"caption-attachment-938\" style=\"width: 1521px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-938\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06.jpg\" alt=\"\" width=\"1521\" height=\"1125\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06.jpg 1521w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06-300x222.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06-768x568.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol06-1024x757.jpg 1024w\" sizes=\"auto, (max-width: 1521px) 100vw, 1521px\" \/><\/a><figcaption id=\"caption-attachment-938\" class=\"wp-caption-text\">Alt\u00e9rites limono-argileuses issues de la d\u00e9calcification du calcaire blanc : formations subverticale au point 9 (\u00e0 gauche) et subhorizontale au point 10 (\u00e0 droite)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\">Les pr\u00e9cipitations participent dans un second temps \u00e0 l\u2019\u00e9vacuation des alt\u00e9rites r\u00e9siduelles limono-argileuses dans les eaux de ruiss\u00e8lement faisant ainsi peu \u00e0 peu appara\u00eetre des chemin\u00e9es de dissolution et retirant ici ou l\u00e0 les fondations aux constructions sus-jacentes.<\/span><\/p>\n<figure id=\"attachment_939\" aria-describedby=\"caption-attachment-939\" style=\"width: 1916px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-939\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07.jpg\" alt=\"\" width=\"1916\" height=\"1125\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07.jpg 1916w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07-300x176.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07-768x451.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol07-1024x601.jpg 1024w\" sizes=\"auto, (max-width: 1916px) 100vw, 1916px\" \/><\/a><figcaption id=\"caption-attachment-939\" class=\"wp-caption-text\">Cavit\u00e9s karstiques apr\u00e8s \u00e9vacuation des alt\u00e9rites : chemin\u00e9es de dissolution au point 11 (fl\u00e8ches bleues \u00e0 gauche), absence de soubassement calcaire aux remparts \u00ab suspendus dans le vide \u00bb au point 12 (fl\u00e8che jaune \u00e0 droite)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\">Le processus de karstification g\u00e9n\u00e8re ainsi un al\u00e9a fort de chute de blocs et d\u2019\u00e9boulements qui est \u00e0 associer \u00e0 l\u2019enjeu historique et patrimonial important que repr\u00e9sentent les remparts pour la commune. C\u2019est dans ce cadre que survient ponctuellement l\u2019effondrement de pans entiers de remparts n\u00e9cessitant la mise en s\u00e9curit\u00e9 du site pour les promeneurs (de nombreux panneaux sont l\u00e0 pour nous rappeler de circuler \u00e0 distance des falaises) et un investissement financier majeur pour la r\u00e9novation et la stabilisation des constructions existantes.<\/span><\/p>\n<figure id=\"attachment_940\" aria-describedby=\"caption-attachment-940\" style=\"width: 1520px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-940\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08.jpg\" alt=\"\" width=\"1520\" height=\"1125\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08.jpg 1520w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08-300x222.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08-768x568.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirol08-1024x758.jpg 1024w\" sizes=\"auto, (max-width: 1520px) 100vw, 1520px\" \/><\/a><figcaption id=\"caption-attachment-940\" class=\"wp-caption-text\">Situation o\u00f9 une partie du rempart s\u2019est effondr\u00e9e au point 13 (\u00e0 gauche) et une autre o\u00f9 la ma\u00e7onnerie a \u00e9t\u00e9 reprise pour \u00e9viter les risques de chute et la sauvegarde du patrimoine au point 14 (\u00e0 droite)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\"><strong><u>Activit\u00e9s envisageables<\/u> :<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #000000\">R\u00e9aliser un sch\u00e9ma fonctionnel de l\u2019\u00e9coulement de l\u2019eau&nbsp;: des pr\u00e9cipitations \u00e0 l\u2019exsurgence d\u2019une source karstique.<\/span><\/li>\n<li><span style=\"color: #000000\">R\u00e9aliser un sch\u00e9ma fonctionnel montrant les diff\u00e9rents ph\u00e9nom\u00e8nes (d\u2019origine naturelle ou anthropique) pouvant entra\u00eener des \u00e9boulements.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000\"><strong><u>Acc\u00e8s \/ s\u00e9curit\u00e9<\/u>&nbsp;:<\/strong><\/span><\/p>\n<p><span style=\"color: #000000\">Commune de Puymirol \u2013 Lot-et-Garonne (47)<\/span><\/p>\n<p><span style=\"color: #000000\">Possibilit\u00e9 de stationnement sur le parking de covoiturage situ\u00e9 en bas de la ville, le long de la D16 au niveau de la croix rouge.<\/span><\/p>\n<figure id=\"attachment_930\" aria-describedby=\"caption-attachment-930\" style=\"width: 1443px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-930\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte.jpg\" alt=\"\" width=\"1443\" height=\"637\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte.jpg 1443w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte-300x132.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte-768x339.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte-1024x452.jpg 1024w\" sizes=\"auto, (max-width: 1443px) 100vw, 1443px\" \/><\/a><figcaption id=\"caption-attachment-930\" class=\"wp-caption-text\">Localisation du circuit<\/figcaption><\/figure>\n<figure id=\"attachment_931\" aria-describedby=\"caption-attachment-931\" style=\"width: 1443px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-931\" src=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2.jpg\" alt=\"\" width=\"1443\" height=\"637\" srcset=\"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2.jpg 1443w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2-300x132.jpg 300w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2-768x339.jpg 768w, https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-content\/uploads\/sites\/59\/2019\/01\/puymirolcarte2-1024x452.jpg 1024w\" sizes=\"auto, (max-width: 1443px) 100vw, 1443px\" \/><\/a><figcaption id=\"caption-attachment-931\" class=\"wp-caption-text\">Localisation du point de vue sur le village (Impossibilit\u00e9 de stationner, observation \u00e0 r\u00e9aliser depuis le bus en arrivant sur le site)<\/figcaption><\/figure>\n<p><span style=\"color: #000000\"><u style=\"font-weight: bold\">Mots-cl\u00e9s et liens avec les programmes<\/u>&nbsp;:<\/span><\/p>\n<p><span style=\"color: #000000\">Al\u00e9as, protection, risque naturel (chute de blocs et \u00e9boulements), ressource naturelle.<\/span><\/p>\n<table style=\"height: 933px\" width=\"1038\">\n<tbody>\n<tr>\n<td colspan=\"2\" width=\"349\">\n<p style=\"text-align: center\"><strong>Coll\u00e8ge<\/strong><\/p>\n<\/td>\n<td colspan=\"2\" width=\"349\">\n<p style=\"text-align: center\"><strong>Lyc\u00e9e<\/strong><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"75\"><strong>Cycle 3<\/strong><\/td>\n<td width=\"273\">\u00bb Paysages, g\u00e9ologie locale, interactions avec l\u2019environnement et le peuplement.<\/p>\n<p>\u00bb Relier certains ph\u00e9nom\u00e8nes naturels (temp\u00eates, inondations, tremblements de terre) \u00e0 des risques pour les populations.<\/p>\n<p>\u00bb Ph\u00e9nom\u00e8nes traduisant l\u2019activit\u00e9 externe de la Terre : ph\u00e9nom\u00e8nes m\u00e9t\u00e9orologiques et climatiques ; \u00e9v\u00e8nements extr\u00eames (temp\u00eates, cyclones, inondations et s\u00e8cheresses&#8230;).<\/td>\n<td rowspan=\"2\" width=\"48\"><strong>2nde<\/strong><\/td>\n<td rowspan=\"2\" width=\"300\">\u00bb L\u2019\u00e9rosion, processus et cons\u00e9quences<\/p>\n<p>\u00bb S\u00e9dimentation et milieux de s\u00e9dimentation<\/p>\n<p>\u00bb \u00c9rosion et activit\u00e9 humaine<\/p>\n<p>&nbsp;<\/td>\n<\/tr>\n<tr>\n<td width=\"75\"><strong>Cycle 4<\/strong><\/td>\n<td width=\"273\">\u00bb L\u2019exploitation de quelques ressources naturelles par l\u2019\u00eatre humain (eau, sol, p\u00e9trole, charbon, bois, ressources min\u00e9rales, ressources halieutiques, &#8230;) pour ses besoins en nourriture et ses activit\u00e9s quotidiennes. Comprendre et expliquer les choix en mati\u00e8re de gestion de ressources naturelles \u00e0 diff\u00e9rentes \u00e9chelles.<\/p>\n<p>\u00bb Proposer des argumentations sur les impacts g\u00e9n\u00e9r\u00e9s par le rythme, la nature (b\u00e9n\u00e9fices\/nuisances), l\u2019importance et la variabilit\u00e9 des actions de l\u2019\u00eatre humain sur l\u2019environnement.<\/p>\n<p>\u00bb Les ph\u00e9nom\u00e8nes naturels : risques et enjeux pour l\u2019\u00eatre humain<\/p>\n<p>\u00bb Notions d\u2019al\u00e9as, de vuln\u00e9rabilit\u00e9 et de risque en lien avec les ph\u00e9nom\u00e8nes naturels ; pr\u00e9visions.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #000000\"><u style=\"font-weight: bold\">Capacit\u00e9s et attitudes<\/u> :<\/span><\/p>\n<p><span style=\"color: #000000\">D4 \u2013 Mener une d\u00e9marche scientifique, r\u00e9soudre un probl\u00e8me<\/span><\/p>\n<p><span style=\"color: #000000\">D5 \u2013 Situer et se situer dans le temps et l\u2019espace<\/span><\/p>\n<p><span style=\"color: #000000\">D5 \u2013 Analyser et comprendre les organisations humaines et les repr\u00e9sentations du monde<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Coordonn\u00e9es GPS de l&#8217;aire de stationnement 44.187153 0.789618 Description du site : Situation La ville de Puymirol est construite sur un plateau calcaire culminant \u00e0 158m d\u2019altitude. Il s\u2019agit d\u2019une &#8230;<\/p>\n","protected":false},"author":8,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-929","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/pages\/929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/comments?post=929"}],"version-history":[{"count":3,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/pages\/929\/revisions"}],"predecessor-version":[{"id":1304,"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/pages\/929\/revisions\/1304"}],"wp:attachment":[{"href":"https:\/\/ent2d.ac-bordeaux.fr\/disciplines\/lithotheque\/wp-json\/wp\/v2\/media?parent=929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}