 The high temperatures created by the impact's force fused sediments into small glassy spherules.Spherules of 3.5 billion years old exist in South Africa and spherules of a similar age have been found in Western Australia, they are the oldest-known terrestrial impact products.The spherules resemble the glassy chondrules (rounded granules) in carbonaceous chondrites, which are found in carbon-rich meteorites and lunar soils.