{"id":23724,"date":"2026-10-22T17:44:55","date_gmt":"2026-10-22T23:44:55","guid":{"rendered":"https:\/\/cocosisland.org\/?p=23724"},"modified":"2026-11-03T14:32:09","modified_gmt":"2026-11-03T20:32:09","slug":"fossils-of-the-unknown-costa-rica-the-ocean-floor","status":"publish","type":"post","link":"https:\/\/cocosisland.org\/en\/fossils-of-the-unknown-costa-rica-the-ocean-floor\/","title":{"rendered":"Fossils of the Unknown Costa Rica: The Ocean Floor"},"content":{"rendered":"

Fossils of the Unknown Costa Rica: The Ocean Floor<\/b><\/h3>\n<\/div>

By: Mar\u00eda Isabel Sandoval
\nMicropaleontologist, University of Costa Rica<\/h4>\n<\/div>

A few weeks ago, the scientific journal Nature published the discovery of a fossil graveyard on the floor of the Indian Ocean, approximately 5 million years old. The site contains the remains of hundreds of beaked whales, a group of cetaceans characterized by diving to great depths. The site is currently located more than 4,000 meters below the sea surface and extends for about 1,200 kilometers.<\/span><\/p>\n

When a whale dies, its body sinks to the seafloor. Once there, its remains can become a true <\/span>oasis of life for other organisms<\/b> and, under certain conditions, its bones can fossilize and be preserved for millions of years.<\/span><\/p>\n

Beaked whales are difficult to observe because of their deep-water lifestyle, so their fossil remains are also rarely seen. However, <\/span>exploring deeper parts of the ocean makes it possible to uncover new evidence that helps reconstruct the history of these little-known environments. <\/b>This evidence includes macrofossils, such as the remains of large vertebrates, and microfossils, whose tiny remains are preserved in the sediments and rocks of the seafloor.<\/span><\/p>\n

Although this discovery took place far from Costa Rica, the story it tells is not foreign to us. <\/span>During a scientific expedition aboard the R\/V Falkor (too), in the Pacific waters of our country, we found fossils of beaked whales several million years old on the tops of some seamounts. <\/b>We also collected rocks and sediments containing fossil microorganisms, including diatoms, radiolarians, and foraminifera.<\/span><\/p>\n

Some species of these organisms lived during specific geological periods and were widely distributed throughout the oceans. For this reason, their presence in a rock or sediment can help us determine its age. <\/span>It is as if each species left a small \u201ctime stamp\u201d on the ocean floor.<\/b><\/p>\n

This type of study is known as biostratigraphy. This discipline uses the distribution and evolution of fossils to establish the relative age of sediments and rocks. In this way, <\/span>fossils become tools that allow us to reconstruct the geological history of a region and relate it to events that occurred on a global scale.<\/b><\/p>\n

The ocean floors may seem like static, isolated places, but in reality they preserve an extraordinary record of Earth\u2019s history. <\/b>Every whale bone, every microfossil, and every stratum, or layer of sediment, can provide a key piece to understanding how the oceans have changed over millions of years.<\/span><\/p>\n

From a geological standpoint, <\/span>knowing the ocean floor is fundamental to interpreting how the planet works. <\/b>Marine environments are closely linked to geological processes that have shaped their characteristics over time and that, in turn, have conditioned the development of life. <\/span>Studying the deep sea is, therefore, studying an essential part of Costa Rica and of the history of the planet we inhabit.<\/b><\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":11,"featured_media":23725,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1769],"tags":[2128],"class_list":["post-23724","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-press-releases","tag-deep-sea"],"_links":{"self":[{"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/posts\/23724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/comments?post=23724"}],"version-history":[{"count":1,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/posts\/23724\/revisions"}],"predecessor-version":[{"id":23727,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/posts\/23724\/revisions\/23727"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/media\/23725"}],"wp:attachment":[{"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/media?parent=23724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/categories?post=23724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cocosisland.org\/en\/wp-json\/wp\/v2\/tags?post=23724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}