The geological framework used to describe the Boston Basin (the bedrock, soil, and landscape underlying one of America's oldest and most densely populated cities) has never been independently validated using modern science. It is based on terminology and concepts introduced in the mid-19th century by Louis Agassiz, a Harvard professor who was also one of the most prominent scientific racists in American history and a creationist who called his framework "The Plan of Creation."

We are calling for a formal, independent, federally led reassessment of the geology of the Boston Basin, including application of modern impact science that has never been applied to the region.

The geological description of Boston has real consequences for millions of people. Every environmental cleanup plan, every contaminant transport model, every construction risk assessment, and every public health evaluation in the Boston Basin depends on an accurate understanding of what the ground is made of, how it behaves, and how water moves through it.

The current framework says the landscape was shaped by glaciers. The drumlins are glacial hills. The till is glacial sediment. The clay is glacial marine clay. The boulders are glacial erratics carried by ice. The fractured bedrock is the result of natural weathering.

There is significant evidence, exposed through a recent CERCLA petition filed with the U.S. EPA (DOI: 10.5281/zenodo.18634019), that this framework may be fundamentally wrong — and that the Boston Basin may instead be a bolide impact site, potentially the first identified ground-zero location for the Younger Dryas Impact Hypothesis, dating to approximately 12,900 years ago.

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Read the full paper here: Gjøvik, Ashley M. “Identification of a New England Bolide Impact Site: A Geologic Reckoning with the Ground-Zero for the Younger Dryas Impact Event”. (March 21, 2026). https://doi.org/10.5281/zenodo.19146482.
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Evidence supporting a bolide impact explanation has been documented in the published scientific literature, in engineering boring logs, in tunnel surveys, and in geotechnical reports for decades. None of it is new. All of it is incompatible with glacial processes:

The bedrock is shattered and cooked. Rock Quality Designation is 0-25% across the basin center in South Boston, meaning the rock is fragmented and badly decomposed. Kaolinization (a thermal and chemical alteration) extends to depths exceeding 200 feet along fault-controlled pathways, requiring temperatures of 175–350°C. There has been no volcanic or tectonic heat source in the Boston Basin in over 400 million years. Glaciers are cold. They cannot produce thermal alteration at any temperature unless they've been hiding some secret superpowers from us.

Multiple mineral thermometers record extreme heat. At least six independent minerals in the basin record temperatures ranging from over 700°C down to below 200°C, forming a thermal decay curve consistent with a single heating event and subsequent cooling. These include titanite (400–700°C), myrmekite (400–600°C), chlorite (200–350°C), and kaolinite (175–350°C). No glacial process produces any of these temperatures.

The damage is inverted. The shallowest rock is the most destroyed; the deepest rock is the least damaged. This is the opposite of every natural metamorphic process, where temperature and pressure increase with depth. It is exactly correct for energy delivered from above — an impact.

The boulders are shock-hardened. A 33-ton boulder in the Fort Point Channel was four times harder than granite and broke diamond drill bits. Glaciers transport rocks. They do not quadruple their hardness. Shock hardening is a diagnostic impact feature.

The clay has no varves. Glacial clay is deposited in seasonal layers called varves, produced by cyclical meltwater variation. The Boston Basin clay has no varves and no fossils. This has been noted as anomalous for decades and never explained within the glacial framework.

Platinum group elements are elevated and not declining. Harbor sediments contain platinum and palladium at five times background levels. Researchers have noted these "may not be decreasing with cessation of sludge input" — suggesting the source is the bedrock itself, not anthropogenic discharge. Elevated platinum is an established proxy for extraterrestrial material.

The mineral suite matches an ordinary chondrite meteorite. When the minerals found throughout the basin are compared to the predicted alteration products of a chondrite impactor mixed with the local sedimentary rock, the match is systematic across iron phases, titanium phases, sulfide mineralogy, phosphate minerals, platinum group elements, and chromium concentrations. The terms used to describe Boston's geology (drumlins, till, erratics, outwash) share a common problem: none of them have independent diagnostic criteria that exclude non-glacial origins.

• Drumlins have no accepted formation mechanism. After 175 years of glacial science, there are dozens of competing hypotheses and none of them work consistently. The definition is based on shape, not process.
• Till is defined as unsorted sediment deposited by ice, but unsorted sediment is produced by debris flows, lahars, impact ejecta, landslides, and any other high-energy mass movement. The only criterion distinguishing "till" from other diamicts is the assumption that a glacier was present. That is circular.
• Erratics are defined as rocks that differ from local bedrock, therefore transported, therefore by ice. But if the local bedrock has been altered beyond recognition by thermal and chemical processes, then an unaltered piece of the original rock looks "erratic" when it's actually the only surviving fragment of what was there before. Or, these boulders are simply stony bolides that survived impact because they landed in a glacier.
• Outwash is sorted, stratified sediment attributed to glacial meltwater, but any flowing water produces sorted, stratified sediment. Without the prior assumption of glaciers, it is simply alluvium.

Every one of these terms assumes glaciers in order to classify features as glacial, then cites those features as evidence of glaciers. This is not science. It is self-referential taxonomy.

Louis Agassiz was hired by Harvard University in 1847 to establish a school of science built around his glacial framework. He founded Harvard University’s new Lawrence Scientific School and used that position to displace an existing hypothesis (documented by Edward Hitchcock in the first Commonwealth geological survey of 1833–1841) that a catastrophic event, possibly a comet impact, had devastated the New England landscape.

Hitchcock initially rejected the comet hypothesis only because 19th century science incorrectly believed comets were made of matter "thinner and lighter than air." That has been known to be wrong for over a century, but nobody reopened the question. Hitchcock also fervently rejected glacial action as a default explanation for Boston geology but his argument were forgotten.

Agassiz replaced indigenous knowledge (the oral traditions of Native peoples who had maintained accounts of fire from the sky and mass destruction for approximately 12,900 years) with a religious European theoretical framework that had no observational basis and no testable mechanism.

He was a creationist who believed God periodically destroyed life with ice ages and then created new species.  He was one of the most prominent advocates of scientific racism in American history, believing that human races were separately created species, the white race was superior to all others, that the Bible only described white people so only they are God's creation, and that the races must be segregated in order to prevent "half breeds."

Agassiz kidnapped and trafficked Africans in 1860, forced his captives to perform "monkey tricks" at US science exhibitions as a demonstration of "specimens of human nature in a savage condition." After one of the captives killed himself, he had Jeffries Wyman dissect the man's body and compared it to a gorilla. 

He collected photos and body parts of Africans under the theory it was specimens of a separate species and "evidence of racial degeneration" that he used to warn against mixing "pure and hybrid races." Agassiz was openly racist and hateful.

Some reading, if you're not familiar: 

• Gibson, L., Harvard's Slave Legacy, Harvard Magazine, April 26 2022.
• Menand, L. (2001). Morton, Agassiz, and the Origins of Scientific Racism in the United States. The Journal of Blacks in Higher Education, 34, 110–113. 
• Wallis, Brian, (1995), Black Bodies, White Science: Louis Agassiz's Slave Daguerreotypes, American Art, Vol. 9, No. 2, pp. 38-61
• Smith, R.A. Types of Mankind: Polygenism And Scientific Racism In The Nineteenth Century United States Scientific Community, Pittsburg State University (2014).
• Wolfe, A.J., The Unloved Naturalist, C&EN, May 20 2013.
• Irmscher, C., The Ambiguous Agassiz, NEH HUMANITIES, November/December 2013, Volume 34, Number 6. 
• Harvard University, Human Remains in University Museum Collections, Fall 2022.
• Iqbal, S.S., Louis Agassiz, Under a Microscope, The Crimson, March 18 2021. 
• Drake, Jarrett Martin (2021) "Blood at the Root," Journal of Contemporary Archival Studies: Vol. 8, Article 6. 
• Harpham, G.G., Chapter 29: Nott, Gilddon, and Agassiz, Theories of Race, 1750-1900, (2023).
• Browley, J. Skulls of Alleged Enslaved Black Americans Returned to New Orleans for Memorial Service, BET, May 30 2025.
• Aggarwal-Schifellite, M., Agassiz’s other photographs tell a global tale of scientific racism, The Harvard Gazette, March 30 2021.
• Haag, C., The secret photos of professor Agassiz, Revista Pesquisa Fapesp, Sept. 2010.

 

Additionally, Agassiz's glacial theories were directly connected to his racist pseudo-science, with him arguing that a "recent ice age" had caused the extinction of prior species of man who were completely separate from existing species. He argued this theory in Brazil, which has no evidence of glaciers in 300 million years (roughly 297 million years prior to the oldest evidence of Homo sp. on earth). Agassiz found evidence of glaciers where ever he needed to in order to justify his racism. In 2021 The Crimson wrote "To Agassiz, the natural world was a window into the mind of God. He was so focused on the philosophical and the divine that he often overlooked the material implications of his research." [The Crimson, 2021].

Agassiz sounds like a truly horrific person and accordingly it would be prudent to challenge all of his scientific theories and determine if evidence actually supports them.

Harvard institutionalized Agassiz's framework. Harvard trained the geologists and those geologists wrote the textbooks. The textbooks trained the next generation and no one has ever gone back to independently validate the foundation — to ask whether the evidence actually supports glacial origins, or whether it was simply assigned glacial labels because those were the only labels available.

This is not only a scientific problem. It is an epistemological one. Indigenous peoples told us what happened. A white supremacist creationist at Harvard said they were wrong, and his institution's authority made that dismissal stick for 175 years.

 

What We Are Asking For:

1. A federally led, independent geological reassessment of the Boston Basin. Led by USGS in coordination with NASA's planetary science and impact expertise. The assessment should be independent of Harvard University and independent of the Commonwealth of Massachusetts, both of which are named defendants in the pending CERCLA petition and have institutional commitments to the existing framework.

2. No new drilling. Use what exists. There are decades of boring logs, tunnel surveys, and geotechnical reports from major infrastructure projects — the Metropolitan District Tunnel, the City Tunnel Extension, the Inter-Island Tunnel, the Northern Middlesex Regional Transit tunnel, and hundreds of engineering borings) that have never been compiled into a modern geological synthesis or considered under non-glacial origins. The data exists so start there and avoid further destabilizing the area. If this is an impact zone with already fractured bedrock and delicate layers of ejects and ash/tuff, with millions of people living on top, then any additional borings risk destabilizing the land.

3. Non-invasive modern survey. Ground-penetrating radar, LiDAR, airborne magnetic surveys, gravity surveys, and drone-based hyperspectral imaging can map subsurface damage patterns, identify anomalous structures, and delineate alteration zones without putting another hole in already-shattered bedrock.

4. Targeted analysis of existing materials. Electron microprobe analysis of apatite for chlorine content (one measurement can test for meteoritic contribution). Shocked quartz analysis. Platinum group element ratios. Systematic compilation of Rock Quality Designation data from existing boring logs. Petrographic re-examination of archived thin sections and core samples. All of this can be done with material already collected.

5. Application of established Younger Dryas impact boundary proxies. The proxies used at every other YDB investigation site worldwide (microspherules, platinum anomalies, nanodiamonds, meltglass, high-temperature mineral assemblages) have never been looked for in the Boston Basin. Look for them, document what is found, and then compare and distinguish with what is found in step six. 

6. Investigation of the Boston Basin as a potential direct impact site. The Younger Dryas Impact Hypothesis has been investigated at dozens of distal sites worldwide, identifying boundary layer proxies deposited by atmospheric fallout hundreds or thousands of miles from the impact. No ground-zero site has ever been identified. If the Boston Basin is one, the investigation required is fundamentally different. A direct impact site produces a different signature than a boundary layer: crater morphology and structural deformation of the basin itself; shock metamorphism in bedrock including planar deformation features in quartz and high-pressure mineral phases; surviving impactor fragments requiring petrographic and geochemical analysis for meteoritic signatures and chondritic mineral phases; melt sheet deposits that may have been misidentified as volcanic tuff or "tuffaceous argillite"; impact breccia that may have been classified as glacial till; and shatter cones in existing tunnel exposures and outcrops. If confirmed, the Boston Basin would be the first Younger Dryas ground-zero site ever documented. The assessment should therefore be conducted with sufficient rigor and thoroughness to serve as a reference case study — establishing the diagnostic criteria, methodologies, and evidentiary standards that can be used to screen for additional ground-zero sites worldwide. What is learned in Boston should make it possible to find the next one.

7. A public, comprehensive report & independent oversight committee. Not behind a paywall. Not in a journal that charges $40 per article. Published in full, with all underlying data, methodology, and analysis accessible to the public, the scientific community, and environmental regulators who need the results to do their jobs. The committee must include expertise in impact geology, planetary science, and indigenous knowledge systems — not only glacial geologists reviewing their own framework. The committee must be independent and empowered to follow the evidence wherever it leads.

8. Harvard must formally reckon with Agassiz's scientific legacy. Harvard University must conduct a formal institutional review of how Agassiz's framework was established, how it displaced indigenous knowledge and a viable alternative hypothesis, and how its institutionalization has affected geological science, environmental regulation, and public safety in the Boston Basin for 175 years. Harvard still actively promotes Agassiz. For example, Agassiz's name is still all over the campus and Harvard's response was that the surname could be his wife or son, they're not sure, so it's probably fine and actually sexist to assume it is about her husband and not her. In 2019, a Harvard museum director was quoted saying Louis Agassiz was "a great man of many contrasts and paradoxes. He did maintain views that are quite reprehensible by today's standards and just flat out wrong, but he also was one of the world’s great naturalists of his day.” [The Crimson, 2019]. 

If the Boston Basin is an impact site, then every environmental site characterization in the region is built on incorrect assumptions. Contaminant transport models that treat the clay as a confining layer, the till as inert glacial sediment, and the bedrock as an impermeable base are wrong. Communities in Roxbury, Dorchester, East Boston, South Boston, and Chelsea (disproportionately low-income communities of color) are built on the most severely damaged substrate, over bedrock that may be actively generating acid mine drainage and leaching metals into groundwater, and no regulatory framework currently accounts for this.

If the Boston Basin is an impact site, it is also an irreplaceable scientific resource: potentially the first identified ground-zero location for a Younger Dryas impact that contributed to the extinction of North American megafauna, the collapse of the Clovis culture, and a 1,300-year climate disruption. Building luxury condominiums on top of it without even knowing what it is would be a loss for all of humanity and put workers and residents at risk of unknown hazards.

Finally, if Indigenous peoples were right all along (if Native folks maintained an accurate account of this event for 12,900 years while Western science dismissed it as myth while creating their own glacial myths) then the least we can do is listen now and apologize. 

("In the legends of the North American Indians we read that the earth was covered with great heaps of ashes...In the legend of the Indians of Lake Tahoe we are told that the stars were melted by the great conflagration, and they rained down molten metal upon the earth....In the legend of the Tupi Indians we are told that God "swept about the fire in such way that in some places he raised mountains and in others dug valleys..." Donnelly, "Ragnarok," 1883).

The evidence exists and has been in the published literature and in engineering files for decades, sometimes for centuries. What has been missing is the willingness to look at them without Agassiz's framework as a filter.

We are asking the federal government to look.

 

Initiated by Ashley M. Gjovik, J.D.

Filed in support of: A CERCLA Petition and Clean Water Act Citizen Suit Notice regarding the South Bay, Fort Point Channel, Roxbury Creek, and Dorchester Brook in Boston, Massachusetts.

DOI: 10.5281/zenodo.18634019