Myanmar Amber in the Global Geological Record
Amber occurs in many regions around the world. Myanmar is important because research has documented several amber-bearing localities with different geological ages; ‘oldest’ depends on which deposit and dating evidence are being compared. Studies report about 109.7 million years for tuffs associated with Hkamti amber, about 98.79 ± 0.62 million years for the Hukawng deposit, and about 72.1 million years for Tilin amber. These dates refer to geological contexts, not a date that can be assigned to every individual piece. Without documented locality and provenance, appearance or inclusions alone cannot establish where a specimen came from.
Sources: Shi et al. (2012), https://doi.org/10.1016/j.cretres.2012.03.014; Zheng et al. (2018), https://www.nature.com/articles/s41467-018-05650-2; Xing & Qiu (2020), https://doi.org/10.1016/j.palaeo.2020.109960
1. Geology: The Hukawng Valley has a unique geology that is conducive to the formation of amber. The valley is located in a tectonically active region and has a complex geological history that includes multiple cycles of uplift and erosion. This has led to the formation of a specific type of rock known as amber-bearing clay, which is rich in organic material and ideal for the preservation of amber.
2. Age: Burmese Amber is estimated to be around 99 million years old, making it the oldest known amber in the world. This is because the Hukawng Valley was located in a tropical region during the Cenozoic era, a time when lush forests and a diverse array of plant and animal life existed. The resin from these ancient trees was washed into the river and eventually buried in sediment, which hardened into amber over millions of years.
Illustrative scene only. It does not depict a verified Late Cretaceous forest or the Hukawng Valley.
Illustrative only. The notes and leaf are not real field records or evidence of amber age, origin, or inclusions.
Conceptual image only. It is not a scientific reconstruction or evidence about Burmese amber.
Illustrative scene only. It does not depict a verified Late Cretaceous forest or the Hukawng Valley.
3. Preservation: The amber-bearing clay in the Hukawng Valley is believed to have formed in an ancient river delta, which protected the amber from erosion and weathering. This has led to the preservation of the inclusions, including insects, plants, and other organic materials, that are found in Burmese Amber.
4. Inclusions: Burmese Amber is known to contain the largest and most diverse variety of terrestrial arthropods, including ants, spiders, beetles, and more. This is because the amber was formed during a time when the diversity of arthropods was high, and the preservation in the river delta allowed for the inclusions to be well-preserved
5. Isolation: The Hukawng Valley is isolated and remote, which has protected it from human activity and allowed the amber to be preserved for millions of years.
It is worth noting that other countries like Canada, Mexico, and the Dominican Republic also have amber deposits, but they are not as old or contain as many inclusions as Burmese Amber.