Do ice cores rule out a worldwide Flood in Noah’s time?

The short answer

Greenland and Antarctic ice cores preserve annual layers through about 2400 BCE, a date sometimes proposed for Noah’s Flood. That continuity weighs against a worldwide catastrophe that would disrupt snowfall records at both sites. A regional flood could leave both cores undisturbed. The cores give us no way to identify a particular regional event as Noah’s Flood.

Three things to check

• The claim. Genesis describes the waters covering the high hills. The Church’s Noah page uses whole-earth language. A published Ensign article explicitly argues for a global reading. Genesis 7 · Gospel Topics, Noah · 1998 Ensign article
• The records. Both polar chronologies preserve seasonal layers on either side of the proposed date. The full case compares actual ice depths and explains how researchers checked the annual counts. Compare the data
• The inference. Ask what a global flood model predicts at the drill sites. Scripture also asks a different question about what God teaches through the story. Peter connects the Flood to baptism. 1 Peter 3:20–21

What is being tested?

In its science episode, Mormon News Roundup argues that a global Flood around 2400 BCE conflicts with polar ice records. The date is part of the proposed chronology. Genesis supplies a sequence of events and ages rather than a BCE date. The physical claim worth testing is that water covered every high mountain in a recent catastrophic flood and would have reached the polar drill sites. Mormon News Roundup, 2:46–3:15, auto-generated captions · Genesis 7:17–24

What did Latter-day Saints teach?

Genesis says the waters covered the high hills under the whole heaven. The Church’s Gospel Topics page on Noah describes Noah’s family as the only people on the whole earth saved from the Flood. In a 1998 Ensign article, Donald W. Parry expressly argued for a worldwide flood over a local one. That is a real strand of LDS teaching and interpretation. Parry’s argument is an attributed magazine article. The Gospel Topics page gives a summary of the story and highlights Peter’s use of the Flood as a figure of baptism. Genesis 7:19–23 · Gospel Topics, Noah · Parry, The Flood and the Tower of Babel

Compare the ice-core records

Snow builds up and compresses into ice. At sites with enough snowfall, researchers can identify recurring seasonal changes in the ice. In Greenland, the GICC05 Holocene chronology combines annual layers from several cores and ties them together using features such as volcanic deposits. At West Antarctica’s WAIS Divide, researchers counted seasonal signals in dust, chemistry, and electrical conductivity. They checked the Holocene chronology by comparing beryllium-10 variations in the ice with a radiocarbon record. Both chronologies carry annual layers across the proposed period. Vinther et al., Greenland Holocene chronology · Sigl et al., WAIS Divide chronology

Here are three rows from the published ice-age scales. The depths are below each drill site’s surface and rounded to the nearest metre. The records use different reference years for counting backwards. For the row labeled 2400 BCE, the Greenland file uses 4,399 years before 2000 and the Antarctic file uses 4,349 years before 1950. Rasmussen, Svensson, and Vinther, GICC05 data · NOAA, WD2014 age-model data

The table shows where these years fall on each chronology. The evidence for continuity comes from the seasonal layers and dating checks behind those assignments. Individual dates can shift with counting or dating revisions. For example, GICC21 revised the most recent 3,800 years of the Greenland record. The earlier interval in this comparison uses GICC05. Rasmussen et al., Greenland data and chronology revisions

What follows from the layers?

The two records weigh against a recent flood severe enough to erase, displace, or interrupt the normal sequence of snowfall at both polar sites. In his analysis of the separate Greenland GISP2 core, Paul Seely asked what would happen even if the ice survived. He expected ocean inundation to leave a large melt layer with marine residue and reports no such layer in that core. That is a specific argument about what a model predicts. The comparison table above shows the annual chronologies, which address a different part of the argument. Seely, GISP2 and Noah’s Flood, pp. 252–53

Jake Hebert of the Institute for Creation Research proposes much heavier post-Flood snowfall to explain how the ice sheets could grow rapidly. More snowfall could explain thickness. A shorter chronology would also have to reproduce the recurring seasonal signals and explain why the counts agree with independent age checks. The cores preserve snowfall at particular sites and leave room for flooding elsewhere. Identifying a regional event behind Genesis would require evidence from that region. Hebert, Ice Cores, Seafloor Sediments, and the Age of the Earth · WAIS Divide annual-layer measurements and checks

A Latter-day Saint response

A regional reading could understand the universal language as describing the world within the story’s horizon. Genesis 41:57 uses sweeping language about all countries coming to Egypt to buy grain. That illustrates how the book can speak universally about a regional setting. Genesis 7 also adds the stronger image of hills under the whole heaven. Moses 7:50 adds Enoch’s prayer that the earth would never again be covered by floods. A regional reading needs to explain both passages. Genesis 41:56–57 · Moses 7:50–52

I take the ice records seriously. They give me reason to question a recent mountain-covering event. I can also read Noah’s story as a witness of judgment, deliverance, and covenant and see why Peter connects it to baptism. The historical question and the meaning I find in the story deserve that same care. Genesis 9:8–17 · 1 Peter 3:20–21 · Come, Follow Me, Genesis 6–11 and Moses 8