The case for significant numbers of extraterrestrial impacts through the late Holocene

Baillie, M. G. L.

doi:10.1002/jqs.1099

Cited by 19 publications

(20 citation statements)

References 37 publications

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“…Searching for such an event is beyond the scope of this article. However, many late Holocene impacts have been documented, including one in Kiowa County, Kansas, ∼160 km northeast of the BC area, that left a 15-m-diameter crater and extensive debris field (53,61).…”

Section: Discussionmentioning

confidence: 99%

Quantifying the distribution of nanodiamonds in pre-Younger Dryas to recent age deposits along Bull Creek, Oklahoma Panhandle, USA

Bement

Madden

Carter

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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Significance In 2007, scientists proposed that the start of the Younger Dryas (YD) chronozone (10,900 radiocarbon years ago) and late Pleistocene extinctions resulted from the explosion of a comet in the earth’s atmosphere. The ET event, as it is known, is purportedly marked by high levels of various materials, including nanodiamonds. Nanodiamonds had previously been reported from the Bull Creek, Oklahoma, area. We investigate this claim here by quantifying the distribution of nanodiamonds in sediments of different periods within the Bull Creek valley. We found high levels of nanodiamonds in YD boundary deposits, supporting the previous claim. A second spike in nanodiamonds during the late Holocene suggests that the distribution of nanodiamonds is not unique to the YD.

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Section: Discussionmentioning

confidence: 99%

Quantifying the distribution of nanodiamonds in pre-Younger Dryas to recent age deposits along Bull Creek, Oklahoma Panhandle, USA

Bement

Madden

Carter

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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“…Cosmogenic tsunami: this category contains only one event that of AD 1014 when widespread flooding occurred in southeast England, Cornwall and possibly Cumbria. It has been suggested that this flooding event is a tsunami linked to a comet impact as indicated by GRIP ice core records and Chinese astronomy (Baillie, 2007). Although speculative at this stage, compelling combined historic and physical evidence persuades that an in-depth investigation should be made of this event.…”

Section: Discussionmentioning

confidence: 96%

Historic tsunami in Britain since AD 1000: a review

Haslett

Bryant

2008

Nat. Hazards Earth Syst. Sci.

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Abstract. The British coast is not considered at particular risk from tsunami, a view that is supported by a number of recent government reports. However, these reports largely ignore some written historic records that suggest southern Britain has experienced a number of events over the past 1000 yrs. This study briefly assesses these records and recognises four groups of events: 1) sea disturbance and coastal floods in southeast England linked to earthquakes in the Dover Straits (e.g. 1382 and 1580), 2) far-field tsunami reaching the coast of the British Isles, for example, from earthquakes along the Azores-Gibraltar Fault Zone offshore Portugal (e.g. 1755), 3) tsunami associated with near-coastal low magnitude earthquakes (e.g. 1884 and 1892), and 4) a flood event in AD 1014 that has been linked to comet debris impact. The seismogenic events range from minor water disturbance, through seismic seiching, to small and "giant" waves, suggesting near-coastal, low-magnitude, shallow earthquakes may be capable of triggering disturbance in relatively shallow water, as supported by similar occurrences elsewhere, and that the British tsunami risk requires a more careful evaluation.

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“…Some authors consider comet sightings and impacts to be prevalent in Celtic myths and legends in Ireland and elsewhere, and link them to some historic environmental catastrophies (McCafferty and Baillie 2005). Baillie (2006Baillie ( , 2007 cites ice core data that show an anomalous peak in ammonium at AD 1014 that he considers indicates a comet impact. This is supported in that the only other ammonium peak of similar size within the last 2000 years occurs in 1908 coincident with the Tunguska bollide impact over Siberia.…”

Section: Discussionmentioning

confidence: 99%

Evidence for historic coastal high-energy wave impact (tsunami?) in North Wales, United Kingdom

Haslett

Bryant

2007

atgeol

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Understanding the contribution of high-energy events (e.g. storms, tsunami) to coastal evolution is currently much debated. Field investigations in North Wales on Anglesey and the Lleyn Peninsula have identified four sites where imbricated boulder trains occur that are discriminators of wave characteristics. Clast analysis indicates that storm wave heights (ca. 20 m), in excess of known extremes (5 to < 9 m), are required to transport them. A plausible explanation is the historic impact of tsunami (≥ 5 m high) that may have been caused either by a) a submarine slide situated offshore on the edge of the continental shelf or Rockall Trough, b) through seismic activity, as the region is one of the most seismically active regions of the British Isles, or c) impact of comet debris in the North Atlantic, with a candidate event around AD 1014. Field evidence suggests that such a high wave-energy event has not recurred along this coast within the last 400 years. RÉSUMÉL'interprétation de la contribution des phénomènes de haute énergie (p. ex. tempêtes, tsunamis) à l'évolution des côtes fait présentement l'objet de beaucoup de débats. Des études sur le terrain dans le Nord du pays de Galles sur l'île d'Anglesey et sur la presqu'île de Lleyn ont défini quatre emplacements qui présentent des traînées de blocs rocheux constituant des discriminateurs des caractéristiques des vagues. Une analyse des clastes révèle qu'il faut des hauteurs de vagues de tempête (environ 20 m), supérieures aux extrêmes connus (5 à moins de 9 m), pour les transporter. Une explication plausible réside dans l'incidence historique des tsunamis (≥ 5 m de hauteur) ayant pu être causés a) par un glissement sous-marin au large de la bordure de la plate-forme continentale ou de la dépression Rockall, b) par l'activité sismique, car la région constitue l'une des régions les plus actives des îles Britanniques sur le plan sismique ou c) par l'incidence de débris de comète dans l'Atlantique nord, un événement candidat étant survenu vers 1014 de notre ère. Des indices sur le terrain laissent supposer qu'aucun phénomène de haute énergie de vagues de ce genre ne s'est reproduit le long de cette côte au cours des 400 dernières années. [Traduit par la redaction]

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The case for significant numbers of extraterrestrial impacts through the late Holocene

Cited by 19 publications

References 37 publications

Quantifying the distribution of nanodiamonds in pre-Younger Dryas to recent age deposits along Bull Creek, Oklahoma Panhandle, USA

Quantifying the distribution of nanodiamonds in pre-Younger Dryas to recent age deposits along Bull Creek, Oklahoma Panhandle, USA

Historic tsunami in Britain since AD 1000: a review

Evidence for historic coastal high-energy wave impact (tsunami?) in North Wales, United Kingdom

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