science

Lagerstätte

Lagerstätte is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lagerstätte rather than just read about it. In short: A Fossil-Lagerstätte (German pronunciation: [ˈlaːɡɐˌʃtɛtə] – from Lager 'storage, lair' and Stätte 'place'; pl. Lagerstätten) is a sedimentary deposit that preserves an exceptionally high amount of palaeontological information.

Key takeaways

Lagerstätte belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lagerstätte to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lagerstätte from memory before moving on to harder problems.

Reference excerpt

A Fossil-Lagerstätte (German pronunciation: [ˈlaːɡɐˌʃtɛtə] – from Lager 'storage, lair' and Stätte 'place'; pl. Lagerstätten) is a sedimentary deposit that preserves an exceptionally high amount of palaeontological information. Konzentrat-Lagerstätten preserve a high concentration of fossils, while Konservat-Lagerstätten offer exceptional fossil preservation, sometimes including preserved soft tissues. Konservat-Lagerstätten may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus delaying the decomposition of both gross and fine biological features until long after a durable impression was created in the surrounding matrix. Fossil-Lagerstätten span geological time from the Neoproterozoic era to the present. Worldwide, some of the best examples of near-perfect fossilization are the Cambrian Maotianshan shales and Burgess Shale, the Ordovician Fezouata Biota, Beecher's Trilobite Bed, and Soom Shale, the Silurian Waukesha Biota, the Devonian Hunsrück Slates and Gogo Formation, the Carboniferous Mazon Creek, the Triassic Madygen Formation, the Jurassic Posidonia Shale and Solnhofen Limestone, the Cretaceous Yixian, Santana, and Agua Nueva formations and the Tanis Fossil Site, the Eocene Fur Formation, Green River Formation, Messel Formation and Monte Bolca, the Miocene Foulden Maar and Ashfall Fossil Beds, the Pliocene Gray Fossil Site, and the Pleistocene Naracoorte Caves and La Brea Tar Pits.

Types Palaeontologists distinguish two major kinds:

Konzentrat-Lagerstätten (concentration Lagerstätten) are deposits with a particular "concentration" of disarticulated organic hard parts, such as a bone bed. These Lagerstätten are less spectacular than the more famous Konservat-Lagerstätten. Their contents invariably display a large degree of time averaging, as the accumulation of bones in the absence of other sediment takes some time. Deposits with a high concentration of fossils that represent an in situ community, such as reefs or oyster beds, are not considered Lagerstätten. Konservat-Lagerstätten (conservation Lagerstätten) are deposits known for the exceptional preservation of fossilized organisms or traces. The individual taphonomy of the fossils varies with the sites. Conservation Lagerstätten are crucial in elucidating important moments in the history and evolution of life. For example, the Burgess Shale of British Columbia is associated with the Cambrian explosion, and the Solnhofen limestone with the earliest known bird, Archaeopteryx.

Preservation Konservat-Lagerstätten preserve lightly sclerotized and soft-bodied organisms or traces of organisms that are not otherwise preserved in the usual shelly and bony fossil record; thus, they offer more complete records of ancient biodiversity and behavior and enable some reconstruction of the palaeoecology of ancient aquatic communities. In 1986, Simon Conway Morris calculated only about 14% of genera in the Burgess Shale had possessed biomineralized tissues in life. The affinities of the shelly elements of conodonts were mysterious until the associated soft tissues were discovered near Edinburgh, Scotland, in the Granton Lower Oil Shale of the Carboniferous. Information from the broader range of organisms found in Lagerstätten have contributed to recent phylogenetic reconstructions of some major metazoan groups. Lagerstätten seem to be temporally autocorrelated, perhaps because global environmental factors such as climate might affect their deposition. A number of taphonomic pathways may produce Konservat-Lagerstätten:

Phosphatization (replacing soft tissues with phosphate, such as Orsten-type and Doushantuo-type preservations). Silicification (replacing or entombing soft tissues with silica, such as petrified wood or Bitter Springs-type preservation). Kerogenization (soft tissues converted into inert carbonaceous films, as found in Burgess Shale-type preservation). Aluminosilification (replacing or coating soft tissues with films of aluminosilicate minerals). Pyritization (replacing soft tissues with pyrite, such as the exquisite detail found in Beecher's trilobite-type preservation). Calcification (replacing or soft tissues with calcite minerals). Siderite or calcite nodules (chemicals released by decaying soft tissue modify the surrounding sediment into a siderite concretion or coal ball encasing the fossil, as found in the Mazon Creek fossil beds). Rapid sediment cementation (impressions of soft tissue preserved through casts and molds in the surrounding sediment, such as Ediacaran-type preservation facilitated by microbial mats). Amber (soft tissues encased in hardened tree resin). The identification of a fossil site as a Konservat-Lagerstätte may be based on a number of different factors which constitute "exceptional preservation". These may include the completeness of specimens, soft tissue preservation, fine-scale detail, taxonomic richness, distinctive taphonomic pathways (often multiple at the same site), the extent of the fossil layer in time and space, and particular sediment facies encouraging preservation.

Examples

See also List of fossil sites (with link directory) Bog body, modern human remains similarly exceptionally preserved within peat bogs, useful for similar reasons within the field of archaeology. Hoard, a concentration of human artifacts useful for similar reasons in archaeology

Notes

References

Further reading Penney, D. (ed.) 2010. Biodiversity of Fossils in Amber from the Major World Deposits. Siri Scienfic Press, Manchester, 304 pp. "Fossil Lagerstätten". Department of Earth Sciences, University of Bristol. 2003. Archived from the original on 12 June 2007. Retrieved 21 November 2005. – A catalogue of sites of exceptional fossil preservation produced by MSc palaeobiology students at University of Bristol's Department of Earth Sciences. Orr, Patrick J.; David J. Siveter (1 January 2000). "Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England". Journal of the Geological Society. 157 (1): 173–86. Bibcode:2000JGSoc.157..173O. doi:10.1144/jgs.157.1.173. S2CID 129635160. Retrieved 26 October 2006. Kimmig, Julien; James D. Schiffbauer (25 April 2024). "A modern definition of Fossil-Lagerstätten". Trends in Ecology and Evolution. 39 (6): 621–624. Bibcode:2024TEcoE..39..621K. doi:10.1016/j.tree.2024.04.004. PMID 38670863. Retrieved 5 May 2024.

Illustrations

Worked examples

Example 1 — a first encounter with Lagerstätte

Start with the simplest possible case. Write down what Lagerstätte claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lagerstätte before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lagerstätte ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lagerstätte

In research: Lagerstätte appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lagerstätte in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lagerstätte is common in secondary-school and first-year university syllabi. It links to neighbouring topics Lagerstätten, so understanding it makes those chapters shorter.
In everyday life: Look for Lagerstätte outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Lagerstätte in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lagerstätte means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lagerstätte out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lagerstätte in simple terms?

Why does Lagerstätte matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lagerstätte?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lagerstätte.