{"id":5868,"date":"2025-02-22T10:57:53","date_gmt":"2025-02-22T09:57:53","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=5868"},"modified":"2026-02-09T08:10:09","modified_gmt":"2026-02-09T07:10:09","slug":"cerrejon","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/cerrejon\/","title":{"rendered":"Cerrej\u00f3n"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00bb1&#8243; custom_padding_last_edited=\u00bboff|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbFondo Men\u00fa\u00bb _builder_version=\u00bb4.27.4&#8243; background_color=\u00bb#00ffff\u00bb custom_margin=\u00bb0px||20px||false|false\u00bb custom_padding=\u00bb0px||0px||true|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; custom_padding_last_edited=\u00bbon|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbIntroducci\u00f3n\u00bb _builder_version=\u00bb4.27.2&#8243; background_enable_color=\u00bboff\u00bb custom_margin_last_edited=\u00bboff|phone\u00bb custom_padding=\u00bb||0px||false|false\u00bb custom_padding_tablet=\u00bb27px||0px||false|false\u00bb custom_padding_phone=\u00bb37px||||false|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row make_equal=\u00bbon\u00bb custom_padding_last_edited=\u00bbon|phone\u00bb _builder_version=\u00bb4.27.2&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb||0px||false|false\u00bb custom_padding_tablet=\u00bb||0px||false|false\u00bb custom_padding_phone=\u00bb||10px||false|false\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.16&#8243; custom_padding=\u00bb|||\u00bb global_colors_info=\u00bb{}\u00bb custom_padding__hover=\u00bb|||\u00bb][et_pb_post_title meta=\u00bboff\u00bb featured_image=\u00bboff\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|600||on|||||\u00bb title_text_align=\u00bbcenter\u00bb title_text_color=\u00bb#000000&#8243; title_font_size=\u00bb70px\u00bb title_letter_spacing=\u00bb1px\u00bb custom_margin=\u00bb||10px||false|false\u00bb animation_style=\u00bbslide\u00bb animation_direction=\u00bbbottom\u00bb title_font_size_tablet=\u00bb50px\u00bb title_font_size_phone=\u00bb20px\u00bb title_font_size_last_edited=\u00bbon|phone\u00bb title_text_shadow_style=\u00bbpreset1&#8243; global_colors_info=\u00bb{}\u00bb][\/et_pb_post_title][et_pb_text content_last_edited=\u00bboff|phone\u00bb _builder_version=\u00bb4.27.4&#8243; header_4_font=\u00bb|700||on|||||\u00bb header_4_text_align=\u00bbcenter\u00bb header_4_text_color=\u00bb#00ffff\u00bb header_4_font_size=\u00bb30px\u00bb header_4_line_height=\u00bb1.4em\u00bb background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb animation_style=\u00bbzoom\u00bb text_font_size_last_edited=\u00bboff|phone\u00bb text_line_height_last_edited=\u00bboff|phone\u00bb header_4_font_size_tablet=\u00bb22px\u00bb header_4_font_size_phone=\u00bb11px\u00bb header_4_font_size_last_edited=\u00bbon|phone\u00bb header_4_text_shadow_style=\u00bbpreset1&#8243; global_colors_info=\u00bb{}\u00bb header_4_text_color__hover_enabled=\u00bboff|hover\u00bb text_text_color__hover_enabled=\u00bboff|desktop\u00bb]<\/p>\n<h4>COLOMBIA<\/h4>\n<p>[\/et_pb_text][et_pb_divider color=\u00bb#999999&#8243; admin_label=\u00bbSeparador\u00bb _builder_version=\u00bb4.27.0&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb-20px||0px||false|false\u00bb custom_padding=\u00bb||||false|false\u00bb animation_style=\u00bbslide\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb0px||10px||false|false\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbzoom\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text ul_position=\u00bbinside\u00bb ul_item_indent=\u00bb20px\u00bb content_last_edited=\u00bboff|desktop\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbTexto\u00bb _builder_version=\u00bb4.27.5&#8243; text_text_color=\u00bb#444444&#8243; ul_text_align=\u00bbjustify\u00bb ul_text_color=\u00bb#444444&#8243; ul_font_size=\u00bb18px\u00bb ul_line_height=\u00bb1.8em\u00bb background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb text_font_size_tablet=\u00bb16px\u00bb text_font_size_phone=\u00bb14px\u00bb text_font_size_last_edited=\u00bbon|phone\u00bb text_line_height_tablet=\u00bb1.7em\u00bb text_line_height_phone=\u00bb1.6em\u00bb text_line_height_last_edited=\u00bbon|phone\u00bb ul_font_size_tablet=\u00bb16px\u00bb ul_font_size_phone=\u00bb14px\u00bb ul_font_size_last_edited=\u00bbon|desktop\u00bb ul_line_height_tablet=\u00bb1.7em\u00bb ul_line_height_phone=\u00bb1.6em\u00bb ul_line_height_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<h2 style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-4309 alignleft\" src=\"https:\/\/clientes.munecarusa.com\/mp\/wp-content\/uploads\/2025\/01\/margen-huella.png\" alt=\"Cerrej\u00f3n\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Cerrej\u00f3n es una formaci\u00f3n geol\u00f3gica ubicada en Colombia que data del Paleoceno medio a tard\u00edo. Se encuentra dentro de la subcuenca de El Cerrej\u00f3n, perteneciente a la cuenca Rancher\u00eda, en el departamento de La Guajira. Esta formaci\u00f3n est\u00e1 compuesta por extensos mantos de hulla que representan un recurso econ\u00f3mico de gran importancia. El carb\u00f3n de la Formaci\u00f3n Cerrej\u00f3n ha sido explotado de manera intensiva en la mina a cielo abierto del mismo nombre, una de las m\u00e1s grandes del planeta. Adem\u00e1s, la formaci\u00f3n alberga f\u00f3siles que constituyen los primeros registros conocidos de selvas neotropicales.[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00bb2_3,1_3&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb0px||10px||false|false\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb2_3&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbzoom\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_image src=\u00bbhttps:\/\/clientes.munecarusa.com\/mp\/wp-content\/uploads\/2025\/03\/Cerrejon.webp\u00bb alt=\u00bbCerrej\u00f3n\u00bb show_in_lightbox=\u00bbon\u00bb use_overlay=\u00bbon\u00bb overlay_icon_color=\u00bb#00ffff\u00bb hover_overlay_color=\u00bbrgba(0,255,255,0.2)\u00bb align=\u00bbcenter\u00bb force_fullwidth=\u00bbon\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb25px||||false|false\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_code disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbMe gusta\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb-20px||||false|false\u00bb global_colors_info=\u00bb{}\u00bb]<div class=\"et_social_networks et_social_1col et_social_slide et_social_rectangle et_social_left et_social_withcounts et_social_shortcode_0 et_social_mobile_on et_social_withnetworknames et_social_outer_dark\">\n\t\t\t\t\t<style type=\"text\/css\">.et_monarch .et_social_shortcode_0 li,.et_monarch .et_social_shortcode_0.et_social_circle ul li i.et_social_icon { background: #ff0000; } .et_monarch .et_social_shortcode_0.et_social_rounded .et_social_icons_container li:hover, .et_monarch .et_social_shortcode_0.et_social_rectangle .et_social_icons_container li:hover, .et_monarch .et_social_shortcode_0.et_social_circle .et_social_icons_container li:hover i.et_social_icon { background: #660000 !important; } .et_monarch .et_social_shortcode_0 .et_social_icons_container li:hover .et_social_icon, .et_monarch .et_social_shortcode_0 .et_social_networks .et_social_icons_container li:hover .et_social_network_label, .et_monarch .et_social_shortcode_0 .et_social_icons_container li:hover .et_social_networkname, .et_monarch .et_social_rounded.et_social_shortcode_0 .et_social_icons_container li:hover .et_social_count, .et_monarch .et_social_rectangle.et_social_shortcode_0 .et_social_icons_container li:hover .et_social_count { color: #ffffff !important; }<\/style>\n\t\t\t\t\t\n\t\t\t\t\t<ul class=\"et_social_icons_container\"><li class=\"et_social_like\">\n\t\t\t\t\t\t<a href=\"#\" class=\"et_social_follow\" data-social_name=\"like\" data-social_type=\"like\" data-post_id=\"0\" target=\"_blank\">\n\t\t\t\t\t\t\t<i class=\"et_social_icon et_social_icon_like\"><\/i>\n\t\t\t\t\t\t\t<div class=\"et_social_network_label\"><div class=\"et_social_networkname\">Me gusta<\/div><div class=\"et_social_count\">\n\t\t\t\t\t\t<span>0<\/span>\n\t\t\t\t\t\t<span class=\"et_social_count_label\">Likes<\/span>\n\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t<span class=\"et_social_overlay\"><\/span>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/li><\/ul>\n\t\t\t\t<\/div>[\/et_pb_code][et_pb_post_title meta=\u00bboff\u00bb featured_image=\u00bboff\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|600||on|||||\u00bb title_text_align=\u00bbcenter\u00bb title_text_color=\u00bb#000000&#8243; title_font_size=\u00bb35px\u00bb title_letter_spacing=\u00bb1px\u00bb custom_margin=\u00bb||0px||false|false\u00bb animation_direction=\u00bbbottom\u00bb title_font_size_tablet=\u00bb30px\u00bb title_font_size_phone=\u00bb20px\u00bb title_font_size_last_edited=\u00bbon|desktop\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_post_title][et_pb_text content_last_edited=\u00bboff|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbSubt\u00edtulo\u00bb _builder_version=\u00bb4.27.4&#8243; header_2_font=\u00bb||||||||\u00bb header_3_font=\u00bb|700||on|||||\u00bb header_3_text_align=\u00bbcenter\u00bb header_3_text_color=\u00bb#444444&#8243; header_3_font_size=\u00bb30px\u00bb header_4_font=\u00bb||||||||\u00bb background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_font_size_last_edited=\u00bboff|phone\u00bb text_line_height_last_edited=\u00bboff|desktop\u00bb header_2_font_size_last_edited=\u00bboff|phone\u00bb header_3_font_size_tablet=\u00bb25px\u00bb header_3_font_size_phone=\u00bb15px\u00bb header_3_font_size_last_edited=\u00bbon|phone\u00bb header_4_font_size_last_edited=\u00bboff|phone\u00bb global_colors_info=\u00bb{}\u00bb header_4_text_color__hover_enabled=\u00bboff|hover\u00bb]<\/p>\n<h3>YACIMIENTOS<\/h3>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbslide\u00bb animation_direction=\u00bbright\u00bb sticky_limit_top=\u00bbrow\u00bb sticky_limit_bottom=\u00bbrow\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_accordion db_closeable=\u00bbon\u00bb db_initial_state=\u00bball_closed\u00bb open_toggle_text_color=\u00bb#FFFFFF\u00bb open_toggle_background_color=\u00bb#660000&#8243; closed_toggle_text_color=\u00bb#FFFFFF\u00bb closed_toggle_background_color=\u00bb#00ffff\u00bb toggle_icon=\u00bb&#x50;||divi||400&#8243; icon_color=\u00bb#FFFFFF\u00bb use_icon_font_size=\u00bbon\u00bb icon_font_size=\u00bb25px\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb toggle_text_color=\u00bb#FFFFFF\u00bb toggle_font=\u00bb|700|||||||\u00bb toggle_font_size=\u00bb22px\u00bb toggle_letter_spacing=\u00bb1px\u00bb body_font=\u00bb|600|||||||\u00bb body_text_color=\u00bb#FFFFFF\u00bb body_link_text_color=\u00bb#FFFFFF\u00bb background_enable_color=\u00bboff\u00bb custom_margin=\u00bb25px||||false|false\u00bb custom_margin_tablet=\u00bb0px||||false|false\u00bb custom_margin_phone=\u00bb0px||||false|false\u00bb custom_margin_last_edited=\u00bbon|tablet\u00bb toggle_font_size_tablet=\u00bb19px\u00bb toggle_font_size_phone=\u00bb16px\u00bb toggle_font_size_last_edited=\u00bbon|phone\u00bb body_font_size_tablet=\u00bb16px\u00bb body_font_size_phone=\u00bb14px\u00bb body_font_size_last_edited=\u00bbon|desktop\u00bb border_width_all=\u00bb0px\u00bb global_colors_info=\u00bb{}\u00bb body_link_text_color__hover_enabled=\u00bbon|hover\u00bb body_link_text_color__hover=\u00bb#00ffff\u00bb][et_pb_accordion_item title=\u00bbPa\u00eds\u00bb open=\u00bbon\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb toggle_font_size_last_edited=\u00bboff|desktop\u00bb]Colombia[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbUbicaci\u00f3n\u00bb open=\u00bboff\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb toggle_font_size_last_edited=\u00bboff|desktop\u00bb]La Guajira: 11\u00b005\u203222\u2033N 72\u00b040\u203231\u2033O[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbEra Geol\u00f3gica\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Era: Cenozoica<br \/>\nPeriodo: Pale\u00f3geno<br \/>\n\u00c9poca: Paleoceno[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbDescubridor\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]John May[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbPrincipal Descubrimiento\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Crocodiliformes[\/et_pb_accordion_item][\/et_pb_accordion][et_pb_counters bar_bg_color=\u00bb#00ffff\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|700|||||||\u00bb title_text_color=\u00bb#444444&#8243; title_font_size=\u00bb22px\u00bb title_letter_spacing=\u00bb1px\u00bb percent_font=\u00bb|600|||||||\u00bb percent_text_color=\u00bb#FFFFFF\u00bb percent_font_size=\u00bb18px\u00bb percent_letter_spacing=\u00bb1px\u00bb custom_padding=\u00bb15px||15px||true|false\u00bb title_font_size_tablet=\u00bb19px\u00bb title_font_size_phone=\u00bb16px\u00bb title_font_size_last_edited=\u00bbon|desktop\u00bb percent_font_size_tablet=\u00bb16px\u00bb percent_font_size_phone=\u00bb14px\u00bb percent_font_size_last_edited=\u00bbon|desktop\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_counter percent=\u00bb59&#8243; _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb bar_background_color_default=\u00bb#00ffff\u00bb use_percentages=\u00bbon\u00bb]Importancia Cient\u00edfica[\/et_pb_counter][\/et_pb_counters][et_pb_number_counter title=\u00bbPatrimonio de la Humanidad\u00bb number=\u00bb2009&#8243; percent_sign=\u00bboff\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|700|||||||\u00bb title_text_align=\u00bbcenter\u00bb title_text_color=\u00bb#FFFFFF\u00bb title_font_size=\u00bb22px\u00bb title_letter_spacing=\u00bb1px\u00bb number_font=\u00bb|700|||||||\u00bb number_text_color=\u00bb#FFFFFF\u00bb number_font_size=\u00bb80px\u00bb number_letter_spacing=\u00bb1px\u00bb number_line_height=\u00bb100px\u00bb background_color=\u00bb#00ffff\u00bb title_font_size_tablet=\u00bb19px\u00bb title_font_size_phone=\u00bb16px\u00bb title_font_size_last_edited=\u00bbon|phone\u00bb number_font_size_tablet=\u00bb70px\u00bb number_font_size_phone=\u00bb60px\u00bb number_font_size_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_number_counter][et_pb_button button_url=\u00bbhttps:\/\/clientes.munecarusa.com\/mp\/yacimientos\/#volver\u00bb button_text=\u00bbYacimientos\u00bb button_alignment=\u00bbleft\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb custom_button=\u00bbon\u00bb button_text_size=\u00bb22px\u00bb button_text_color=\u00bb#FFFFFF\u00bb button_bg_color=\u00bb#00ffff\u00bb button_border_radius=\u00bb0px\u00bb button_font=\u00bb|700|||||||\u00bb button_icon=\u00bb&#x24;||divi||400&#8243; custom_margin=\u00bb0px||||false|false\u00bb custom_padding=\u00bb15px||15px||true|false\u00bb button_text_size_tablet=\u00bb19px\u00bb button_text_size_phone=\u00bb16px\u00bb button_text_size_last_edited=\u00bbon|phone\u00bb button_icon_last_edited=\u00bboff|desktop\u00bb button_on_hover_phone=\u00bbon\u00bb button_on_hover_last_edited=\u00bboff|phone\u00bb custom_css_main_element=\u00bbwidth:100%;\u00bb global_colors_info=\u00bb{}\u00bb button_text_color__hover_enabled=\u00bboff|desktop\u00bb button_bg_color__hover_enabled=\u00bbon|hover\u00bb button_bg_color__hover=\u00bb#660000&#8243; button_bg_enable_color__hover=\u00bbon\u00bb][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb30px||0px||false|false\u00bb animation_style=\u00bbzoom\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text content_last_edited=\u00bboff|desktop\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbTexto\u00bb _builder_version=\u00bb4.27.5&#8243; text_text_color=\u00bb#444444&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb text_font_size_tablet=\u00bb16px\u00bb text_font_size_phone=\u00bb14px\u00bb text_font_size_last_edited=\u00bbon|phone\u00bb text_line_height_tablet=\u00bb1.7em\u00bb text_line_height_phone=\u00bb1.6em\u00bb text_line_height_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb]La Formaci\u00f3n Cerrej\u00f3n se divide en tres unidades: inferior, media y superior, bas\u00e1ndose en el espesor y la distribuci\u00f3n de los estratos carbon\u00edferos. En promedio, los mantos de carb\u00f3n tienen unos 3 metros de grosor, aunque pueden variar entre 0,7 y 10 metros, siendo los m\u00e1s gruesos los situados en la parte superior. Seg\u00fan las asociaciones de litofacies y la composici\u00f3n paleobot\u00e1nica, el ambiente deposicional fluctu\u00f3 desde una llanura costera influenciada por estuarios en la base de la formaci\u00f3n hasta una llanura costera fluvial en los niveles superiores.<\/p>\n<p>En tiempos geol\u00f3gicos recientes, parte del carb\u00f3n sufri\u00f3 combusti\u00f3n espont\u00e1nea de forma natural, generando un material rojizo similar al ladrillo y al clinker. Estas rocas afloran de manera irregular y pueden superar los 100 metros de espesor. El clinker aparece cerca de zonas deformadas, como fallas o pliegues cerrados, y es m\u00e1s antiguo que las propias deformaciones. Se cree que estas combustiones ocurrieron despu\u00e9s del desarrollo de la falla de cabalgamiento y del abanico aluvial de Cerrej\u00f3n. Los f\u00f3siles encontrados en la formaci\u00f3n representan el registro m\u00e1s antiguo de selvas neotropicales, con abundantes macrof\u00f3siles vegetales y palinomorfos. Tambi\u00e9n se han hallado restos de vertebrados ribere\u00f1os, como peces pulmonados, tortugas, serpientes y crocodiliformes. Con base en estos f\u00f3siles y en la estratigraf\u00eda, se deduce que la Formaci\u00f3n Cerrej\u00f3n correspond\u00eda a una llanura costera cubierta por una selva h\u00fameda atravesada por grandes sistemas fluviales.<\/p>\n<p>Se estima que esta selva se encontraba en una paleolatitud cercana a los 5\u00b0N. Durante el Paleoceno, las temperaturas ecuatoriales eran considerablemente m\u00e1s altas que las actuales. A partir del tama\u00f1o de la serpiente gigante Titanoboa \u2014cuyos restos se han encontrado en Cerrej\u00f3n\u2014 se calcula que la temperatura media anual en la zona ecuatorial de Sudam\u00e9rica oscilaba entre 30 \u00b0C y 34 \u00b0C, el rango m\u00ednimo necesario para que un animal poiquilotermo de ese tama\u00f1o pudiera sobrevivir.<\/p>\n<p>Estos valores concuerdan con los modelos clim\u00e1ticos del Paleoceno, que indican un clima de efecto invernadero y una concentraci\u00f3n atmosf\u00e9rica de CO\u2082 cercana a las 2.000 ppm. Sin embargo, las estimaciones basadas en asociaciones de hojas f\u00f3siles de Cerrej\u00f3n sugieren temperaturas medias anuales entre 6 y 8 \u00b0C menores, aunque estos valores se consideran demasiado bajos debido a que provienen de flora ribere\u00f1a y de humedales, menos representativa del clima general.<\/p>\n<p>Aunque temperaturas medias de 30 a 34 \u00b0C ser\u00edan excesivas para los bosques tropicales modernos, la selva de Cerrej\u00f3n pudo mantenerse gracias a los elevados niveles de CO\u2082 y a una precipitaci\u00f3n anual estimada en unos 4 metros.<\/p>\n<p>El registro paleobot\u00e1nico de la Formaci\u00f3n Cerrej\u00f3n es muy completo, con numerosos microf\u00f3siles vegetales excepcionalmente preservados, algunos incluso con estructuras celulares intactas. En comparaci\u00f3n con las selvas neotropicales actuales, la diversidad vegetal es relativamente baja, lo que podr\u00eda reflejar una etapa temprana en la diversificaci\u00f3n de los neotr\u00f3picos o un lento proceso de recuperaci\u00f3n tras el evento de extinci\u00f3n del l\u00edmite Cret\u00e1cico\u2013Terciario.<\/p>\n<p>Muchas plantas de Cerrej\u00f3n pertenecen a familias que a\u00fan dominan las selvas neotropicales actuales. Entre ellas destacan numerosas palmas y leguminosas. Adem\u00e1s, gran parte de la biomasa del bosque paleoceno estaba compuesta por laurales, malvales, Menispermaceae, Araceae y Zingiberales. Estudios de flora f\u00f3sil del Cret\u00e1cico indican que la vegetaci\u00f3n anterior al l\u00edmite K\u2013T era muy distinta. Las leguminosas, por ejemplo, no aparecen en estratos cret\u00e1cicos y probablemente surgieron o se diversificaron durante el Paleoceno.<\/p>\n<p>La presencia de estas familias en Cerrej\u00f3n demuestra que los componentes esenciales de las selvas neotropicales modernas ya exist\u00edan desde hace decenas de millones de a\u00f1os, resistiendo cambios clim\u00e1ticos y geogr\u00e1ficos en Sudam\u00e9rica. Durante mucho tiempo se pens\u00f3 que las selvas neotropicales eran producto de fluctuaciones ambientales del Cuaternario, pero el registro f\u00f3sil de Cerrej\u00f3n indica que la diversidad amaz\u00f3nica actual tiene ra\u00edces profundas en el Cenozoico temprano.<\/p>\n<p>El da\u00f1o producido por insectos herb\u00edvoros es evidente en muchos macrof\u00f3siles vegetales de Cerrej\u00f3n. Cerca de la mitad de los espec\u00edmenes estudiados muestran se\u00f1ales de alimentaci\u00f3n por insectos, aunque estos eran mayoritariamente generalistas, a diferencia de los insectos neotropicales modernos, que suelen ser altamente especializados. No hay indicios de densidades elevadas de insectos ni de asociaciones espec\u00edficas entre plantas y herb\u00edvoros, lo que sugiere una diversidad relativamente baja. Los restos de Titanoboa cerrejonensis se encontraron en una capa gris de arcilita bajo la veta de carb\u00f3n 90 de la mina. Titanoboa es la serpiente m\u00e1s grande conocida, con una longitud estimada de 13 metros. Su pariente viviente m\u00e1s comparable ser\u00eda la anaconda (Eunectes).<\/p>\n<p>En la misma capa se describi\u00f3 en 2010 un crocodilomorfo diros\u00e1urido llamado Cerrejonisuchus improcerus. Este peque\u00f1o diros\u00e1urido posee el hocico m\u00e1s corto en proporci\u00f3n al cr\u00e1neo de todo su grupo. Mientras muchos diros\u00e1uridos eran marinos y ten\u00edan hocicos largos adaptados a capturar peces, el hocico corto de Cerrejonisuchus sugiere una dieta m\u00e1s generalista en un ambiente acu\u00e1tico transicional. Es posible que fuera presa de Titanoboa, ya que ambos compart\u00edan el mismo ecosistema fluvial. En 2011 se describi\u00f3 otro diros\u00e1urido de la formaci\u00f3n, Acherontisuchus, de mayor tama\u00f1o y con un hocico largo, m\u00e1s parecido a los diros\u00e1uridos t\u00edpicos.<\/p>\n<p>La Formaci\u00f3n Cerrej\u00f3n contiene enormes vetas de carb\u00f3n explotadas principalmente en la mina del Cerrej\u00f3n. Este carb\u00f3n es valorado por su bajo contenido de cenizas y azufre, as\u00ed como por su resistencia a la aglomeraci\u00f3n. La mina del Cerrej\u00f3n es la mayor productora de carb\u00f3n de Colombia y la operaci\u00f3n minera de carb\u00f3n m\u00e1s grande de Am\u00e9rica Latina, con una producci\u00f3n estimada de 28 millones de toneladas en 2006, la mayor\u00eda destinada a Europa.[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbPie de P\u00e1gina\u00bb _builder_version=\u00bb4.27.0&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||0px||false|false\u00bb custom_padding=\u00bb||0px||false|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row column_structure=\u00bb1_3,1_3,1_3&#8243; use_custom_gutter=\u00bbon\u00bb gutter_width=\u00bb1&#8243; make_equal=\u00bbon\u00bb disabled_on=\u00bbon|on|off\u00bb admin_label=\u00bbPc\u00bb _builder_version=\u00bb4.27.0&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb 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neotropicales&#8230;<\/p>\n","protected":false},"author":1,"featured_media":5876,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[13],"tags":[],"class_list":["post-5868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-yacimientos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cerrej\u00f3n | Diversidad de Insectos<\/title>\n<meta name=\"description\" content=\"Muchas plantas de la formaci\u00f3n Cerrej\u00f3n pertenecen a familias que a\u00fan son comunes en las selvas neotropicales.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" 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