By Danavir Goswami
From Sri Garga Samhita: Canto 2, Chapter 2, Text 48. Translation by Sriman Kusakratha Prabhu, purport by Danavir Goswami.
sri-pulastya uvaca gire tvayati-dhrstena na krto me manorathah tasmat tu tila-matram hi nityam tvam ksinatvam vraja
sri-pulastyah uvaca-Sri Pulastya said; gire-O mountain; tvaya-by you; ati-dhrstena-very arrogant; na-not; krtah-done; me-to me; manorathah-desire; tasmat-therefore; tu-indeed; tila-matram-the size of a sesame seed; hi-indeed; nityam-always; tvam-you; ksinatvam-diminution; vraja-go.
Sri Pulastya said: O arrogant mountain, you would not fulfill my desire! Therefore every day you will become smaller by the size of a sesame seed.
Using today’s medium-sized sesame seed length of about 2 millimeters, a rough calculation of the height of Govardhana Hill at the time when Nanda Maharaja was present (approximately 5,234 years ago) would be 12,736 feet high (3,820 meters ) or 2.4 miles high (3.8 kilometers).
Thus 5,234 years X 365 days = 1,910,410 days multiplied by .08 inches/sesame seed = 152,832 inches divided by 12 = 12,736 feet.
Since Govardhana described his height as 2 yojanas (16 miles) in verse thirty earlier in this chapter, one could estimate, provided the rate of reduction described remained constant, that the cursing by Sri Pulastya took place approximately 35,000 years ago.