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Micropaleontologists of the University of Zaragoza show that the Mass Extinction of the K/T Boundary was sudden

News appeared in the Spanish version of National Geographic in 2005

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The age of the Chicxulub impact under debate

Report in Science & Vie on our results of the study of Yaxcopoil-1 drill hole which support a K/T age for the impact, and on the debate stirred up by the interpretations of the Gerta Keller, which suggest that the impact was 300,000 years before.

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Eustoquio Molina, 2007 Research Award of the Royal Academy of Sciences

Interview in El Periódico with the ocassion of the scientific award.

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Estratotype Golden Spikes Ceremony in Zumaia

The plates and golden spikes defining the Danian/Selandian and Selandian/Thanetian boundaries were fixed at Zumaia. Many scientists, the Mayor of Zumaia and a Basque Deputy participated in the ceremony. In the photograph Eustoquio Molina, as chairman of the ISPS, unveils the plate defining the Danian/Selandian boundary.

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The evidence of the meteorite impact

The team of Micropaleontology of the University of Saragossa confirms that a meteorite impact was the cause that trigered the extinction at the Cretaceous/Tertiary boundary

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Leonardo scholarship to Laia Alegret

The BBVA Foundation awards its prestigious Leonardo scholarship to Laia Alegret, to carry out her post-cruise research after participation in IODP 371 Expedition.




Zumaya, the open book of the history of Earth for Paleocene Stages

The International Working Group on Paleocene met in Zumaia and decided unanimously to define the boundary stratotypes for the Selandian and Thanetian.

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Full conversation of Laia Alegret with El País

You can see the full conversation of @AlegretLaia with El País / Materia from the vessel Joides Resolution, exploring the hidden continent, Zealandia.



XXX Jornadas de Paleontología

Laia Alegret participates as invited speaker at the XXX Jornadas de Paleontología, organised by the Spanish Society of Paleontology and Dinópolis. After giving a lecture about, he participated in a debate on Extinctions with Asier Hilario, moderated by Mariano Moles.


Lessons with a natural history book

The joint field trip of Extinction and evolution events and Applied Micropaleontology students to visit several extinction events in Zumaya and the Montxo shipwreck was reported in Diario Vasco.

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Lecture on dinosaur's extinction

As closure of the Academic Year 2009-2010 at the Universidad de la Experiencia in Calatayud, José Antonio Arz gave a lecture entitled: "The tragic demise of the dinosaurs"

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A meteorite impact was the cause of the dinosaurs extinction

The extinction coincides with the meteorite impact evidence according to Eustoquio Molina, Ignacio Arenillas and José Antonio Arz.

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Eustoquio Molina was elected as a member of the Real Academia de Ciencias

Eustoquio Molina was elected as a member of the Real Academia de Ciencias de Zaragoza in October 2015 and made his admission speech as a numerary member, in June 2016. Photo with the president of the Academy after the delivery of the medal and the diploma.


Eustoquio Molina received the Aragonia prize

Eustoquio Molina received the Aragonia prize in recognition of his excellent career in the field of Paleontology, awarded by Sociedad de Amigos del Museo de Ciencias Naturales de la Universidad de Zaragoza (SAMPUZ), in December 2017.


Cuban microfossils offer support for meteor role in dinosaurs extinction

The paper of the team of Micropaleontology, Alegret et al. (2005) published in Geology, was reported in the New York Times.

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Lecture on the European Geoparks Week 2013

José Antonio Arz gave a lecture in Zumaia entitled: From Zumaia to Mexico: key from extinction of the dinosaurs.

You can listen to the interview on Radio Euskadi in the Webpage:


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New causes of the extinction that occurred in the oceans after an asteroid impact 65 million years ago

The study, published by Laia Alegret, Ellen Thomas and Kyger C. Lohmann, shows that the photosynthesis and the food chain in the oceans recovered much earlier than previously suggested. A rapid episode of surface ocean acidification after the impact may have been the main cause of extinction of numerous species, while taxa that lived at the deep sea floor survived.

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Eustoquio Molina received the prize Lupa Escéptica

Eustoquio Molina received the prize Lupa Escéptica of science popularization and critical thinking, awarded by the cultural association Alternativa Racional a las Pseudociencias-Sociedad para el Avance del Pensamiento Crítico (ARP-SAPC), in March 2014.


Juan Luis Arsuaga Doctor Honoris Causa

Eustoquio Molina acted as sponsor in the investidure of Juan Luis Arsuaga as Doctor Honoris Causa by the University of Zaragoza.


Lecture on the Cretaceous/Tertiary boundary extinction event

In the Miramon Kutxaespacio de la Ciencia (San Sebastian) Eustoquio Molina lectured on "El impacto que acabó con los dinosaurios: evidencias en Zumaia y San Sebastián"

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Expedition to study the hidden continent, Zealandia.

Laia Alegret participates as staff scientist in IODP Expedition 371, aboard the Joides Resolution. During 2 months (July 27 - September 26, 2017), they drill sediment cores on the ocean floor in the Tasman Sea (SW Pacific) to study the hidden continent, Zealandia, and to analyse the Paleogene climate. https://iodp.tamu.edu/scienceops/expeditions/tasman_frontier_subduction_climate.html


The Ypresian/Lutetian Boundary defined

The Ypresian/Lutetian boundary has been defined at meter 167.85 of the Gorrondatxe section, near Bilbao (Spain), in a dark marly level where  the nannofossil Blackites inflatus first occurs, 48 Ma ago.

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Documentary on extinction at Zumaia: Flysch, el susurro de las rocas


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Lecture on the Chicxulub impact

In the I Jornadas de Paleontología Comarca de Tierras Altas (Soria), José Antonio Arz lectured on "Chicxulub: the death fell from the sky"

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Laia Alegret received the Alfred Curtins Medal

The National Research Foundation of Flanders (FWO) awards Laia Alegret the Alfred Curtins Medal in recognition of her work as a member of the Expert Panel Sciences of the Earth and Space (2013-2015).


Laia Alegret is selected as staff scientist of IODP

Laia Alegret is selected as staff scientist of IODP (International Ocean Discovery Program) Expedition 371, financed with more than 12 million euros. In addition to exploring Zealandia, the new continent, they will analyse the subduction initiation in the Tasman Frontier, and the climate of the Paleogene. https://iodp.tamu.edu/scienceops/precruise/tasman/participants.html


Evidence for global cooling in the Late Cretaceous

Temperatures dropped 7 ºC in the last 17 million years of the Cretaceous. Nature Communications published a study based on Tex86 index,  in which we have contributed in the developing an age model from planktonic foraminifera.

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Confirmed: the Chicxulub impact caused the K/T extinction

Members of the IUCA and the Team of Micropaleontology of the Universidad de Zaragoza, along with 38 other specialists, publish in the prestigious Journal Science a review corroborating the theory that the impact of a large meteorite in the Yucatan peninsula caused the mass extinction event of the Cretaceous/Tertiary boundary. The alternative hypothesis supporting a more gradual extinction due to multiple causes (mainly to the unusual volcanic activity of the Deccan, India) is weakened.

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The sea level rise will cause serious problems and even wars

Eustoquio Molina lectured in San Sebastian indicating that the world is overpopulated, people ignores the consequences of climate warming, the sea level rise will cause serious problems and even wars. Many politicians and religious leaders do nothing to stop global warming and because of that are irresponsibles.

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Patterns and causes of evolution and extinction

The group of Micropaleontology, dinosaurs and mammals that research on evolution and extinction is reported in Tercer Milenio of Heraldo de Aragón

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Eustoquio MOLINA
Qualifications: Full Professor of Paleontology (Micropaleontology). Principal researcher
More information: Doctor at the University of Granada in 1979, specialist in Planktic Foraminifera (Upper Cretaceous to Lower Neogene).

EMail: emolina@unizar.es
Web: http://wzar.unizar.es/perso/emolina/index.html
Qualifications: Associate Professor of Paleontology (Micropaleontology). Researcher
More information: Doctor at the University of Saragossa in 1996, specialist in Planktic Foraminifera (Paleocene and Eocene).
EMail: ias@unizar.es
Web: http://wzar.unizar.es/perso/iarenillas/index.php
José Antonio ARZ
Qualifications: Associate Professor of Paleontology (Micropaleontology). Researcher
More information: Doctor at the University of Saragossa in 1996, specialist in Planktic Foraminifera (Upper Cretaceous).

EMail: josearz@unizar.es
Web: http://wzar.unizar.es/perso/arz/index.php
Qualifications: Associate Professor of Paleontology (Micropaleontology) Researcher
More information: Doctor at the University of Saragossa in 2002, specialist in Benthic Microforaminifera (Upper Cretaceous - Oligocene)
EMail: laia@unizar.es
Web: http://wzar.unizar.es/perso/alegret/index.html
Lucía Rivero Cuesta
Qualifications: PhD Student (2015/2019). Researcher
More information: PhD student working on paleoclimatic reconstructions based on benthic foraminifera assemblages and geochemistry, particulary across Eocene hyperthermal events.
EMail: lrivero@unizar.es
Vicente Gilabert Pérez
Qualifications: PhD Student (2017/2021). Researcher
More information: Analyses of Deccan volcanism paleoenvironmental effects during K/Pg transit using planktonic foraminifera.
EMail: vgilabert@unizar.es
Alba Legarda Lisarri
Qualifications: PhD Student Researcher
More information: Responses of marine systems to climate, specifically across Eocene-Oligocene transition. She is specialist in paleoecologic, paleoceanographic and paleoclimatologic reconstructions based on planktic foraminifera assemblage analysis and stable isotopes.
EMail: legarda.geo@gmail.com
© Team of Micropaleontology of the University of Zaragoza / 2008 /
Department of Earth Sciences / Pedro Cerbuna Street, 12 - 50009 ZARAGOZA, SPAIN