Scriptures: A Kalpa (Hindu) is equal to 4.32 billion years, a day (day only - not night) of Brahma. This has been calculated as the time when all known planets (at that time), stars (selected) and the apogees and perigees of the orbits were in line. (See” how many kinds of yugas are there” for further details.) Brahma creates at the beginning of his day and dissolves his creation at the beginning of his night”. One second of Brahma = 1 human year!
Science: “The oldest rocks which have been found so far (on the Earth) date to about 3.8 to 3.9 billion years ago (by several radiometric dating methods). Some of these rocks are sedimentary, and include minerals which are themselves as old as 4.1 to 4.2 billion years. Rocks of this age are relatively rare, however rocks that are at least 3.5 billion years in age have been found on North America, Greenland, Australia, Africa, and Asia. ……While these values do not compute an age for the Earth, they do establish a lower limit (the Earth must be at least as old as any formation on it). This lower limit is at least concordant with the independently derived figure of 4.55 billion years for the Earth’s actual age.” ….from http://www.talkorigins.org/faqs/faq-age-of-earth.html
…” The most direct means for calculating the Earth’s age is a Pb/Pb isochron age. Most of the other measurements for the age of the Earth rest upon calculating an age for the solar system by dating objects which are expected to have formed with the planets but are not geologically active (and therefore cannot erase evidence of their formation), such as meteorites.” Based on these methods, the tables at the above links give values of 4.21 to 4.59 billions of years as the age of the earth.