From
http://bharatkalyan97.blogspot.in/2013/07/ramayana-mythology-or-history-k.html 
The cultural memory of Ramayana narrative is abiding and intense in many parts of the globe.
śrāddham -- homage to pitṛs, ancestors -- is performed by pilgrims at Dhanushkodi. They draw a dhanush (bow) on the sands, offer samkalpam, create a śivalinga from the wet sands, perform puja and immerse the linga in the sacred waters of Setusamudram.
śankha is a shell unique to Indian Ocean rim and is sacred in Hindu traditions. Sacred śankha lives on the Ramasetu. śankha can live only on hard surfaces like boulder conglomerates and not on shifting sands. The boreholes drillings by NIOT revealed boulder conglomerates as one layer, conclusively proving that boulders obtained from land were used for the construction of the Setubandha causeway linking Dhanushkodi and Talaimannar.
This is a world heritage monument and a celebration of protection of dharma by rescuing Sita devi. Valmiki calls Sri Rama vigrahavān dharmah'embodiment of dharma'.
Valmiki ramayana, Sarga 21, Yuddhakandam describes Rama's victory over the ocean; he releases the arrow which makes a volcano erupt. This episode is rendered as a painting by Ravi Varma.
DERIVED FROM BOREHOLE DATA OF NIOT (SECTION NOT TO SCALE)
RAMAYANA – A MYTHOLOGY OR HISTORY ?
http://www.scribd.com/doc/156149708/Ramayana-FACTS-EVIDENCES-K-Gopalakrishnan-July-2013
http://bharatkalyan97.blogspot.in/2013/07/ramayana-mythology-or-history-k.html
The cultural memory of Ramayana narrative is abiding and intense in many parts of the globe.
śrāddham -- homage to pitṛs, ancestors -- is performed by pilgrims at Dhanushkodi. They draw a dhanush (bow) on the sands, offer samkalpam, create a śivalinga from the wet sands, perform puja and immerse the linga in the sacred waters of Setusamudram.
śankha is a shell unique to Indian Ocean rim and is sacred in Hindu traditions. Sacred śankha lives on the Ramasetu. śankha can live only on hard surfaces like boulder conglomerates and not on shifting sands. The boreholes drillings by NIOT revealed boulder conglomerates as one layer, conclusively proving that boulders obtained from land were used for the construction of the Setubandha causeway linking Dhanushkodi and Talaimannar.
This is a world heritage monument and a celebration of protection of dharma by rescuing Sita devi. Valmiki calls Sri Rama vigrahavān dharmah'embodiment of dharma'.
Valmiki ramayana, Sarga 21, Yuddhakandam describes Rama's victory over the ocean; he releases the arrow which makes a volcano erupt. This episode is rendered as a painting by Ravi Varma.
DERIVED FROM BOREHOLE DATA OF NIOT (SECTION NOT TO SCALE)
Similar Boulder Conglomerate Beds are recorded in
Mannar on Sri Lankan side
Mannar on Sri Lankan side
RAMAYANA – A MYTHOLOGY OR HISTORY ?
FACTS & EVIDENCES
COMPILED AND PRESENTED
By
K.Gopalakrishnan,
Director (Retired), Geological Survey,
Government of India
WHY THIS QUESTION ? TWO CONTROVERSIES REGARDING RAMAYANA ARE RAGING IN INDIA.
Rama Janma Bhoomi issue.
Rama Sethu issue.
Both cases are pending with the Supreme Court of India.
One, concerning the Demolition of an existing Mogul structure-Babri Masjid by Hindu activists.
The Other, regarding the Attempt at the Destruction of an existing Hindu Structure-Rama Sethu by the secularist Government of India.
FACTS & EVIDENCES
COMMON SENSE REASONS.
AGE OF RAMAYANA
FROM HINDU COSMIC TIME SCALE
(i) As per Yuga Cycles
(ii) As per Vishnu Purana
(iii) As per Manu Samhita
(iv) As per Srimad Bhagavatham
(v) As per Swami Yukteshwar Giri
B. ASTRONOMICAL EVIDENCES
(i) By Vedic Astronomy –by Dr. P.V.Vartak
(ii) By modern Astronomy – by Pushkar Bhatnagar
C. SCIENTIFIC EVIDENCES
(i) Sea Level Changes
(ii) Fossil Evidences of Early man's Migration
(iii) Botanical Evidences
(iv) Zoological Evidences
3. HISTORICAL EVIDENCES
Lineage of Rama
(i) Rama's Ancestors (ii) Rama's Descendants
B. References in Ancient Literature
(i) Puranas
(ii) Tamil Sangam Literatures
(iii) Other 5th – 6th Century Literatures
(iv) References Later Ramayanas in Other Languages
(v) Moghul Time Ramayana and Mahabharata
(vi) Ramayana in Southeast Asia
(vii) References in Historical Paintings
C. HISTORICAL PAINTINGS
D. OLDER RECORDS AND TRAVELLOGUES
E. REFERENCES IN HISTORICAL MAPS
F. LOGO OF SURVEY OF INDIA
4. ARCHAEOLOGICAL EVIDENCES
From Excavations
Inscriptions on Pillars, Plaques and Copper Plates
References in Ancient Coinages
References in Ancient Temple Sculptures
5. GEOGRAPHICAL EVIDENCES
Rama's Trip with Maharishi VISHWAMITRA
Rama's route during Vanavas and to Sri Lanka
6. GEOGRAPHICAL EVIDENCES IN TAMIL NADU
7. GEOGRAPHICAL EVIDENCES IN SRI LANKA
8. GEOLOGICAL EVIDENCES IN TAMIL NADU
9. GEOLOGICAL EVIDENCES IN SRI LANKA
10. GEOTECTONIC EVIDENCES
From the present-Day Active zone in South Pacific to the Present-Day apparently Inactive Rama Sethu Zone
Earth Movements, and Rise of Hill form the Ocean and corresponding subsidence on Sri Lankan side
Valmiki's Description of the Gulf of Mannar site with Rama's arrow piercing the ocean, producing Earquakes, Volcanic Eruption and Tsunami generation
Drying up of far away ocean and island called Markandhara in the north by Rama's Brahmaastra – the present-day Taar Desrt in Rajasthan with trillions of tons of Rock Salt below sand.
11. EVIDENCE FROM BOREHOLES IN RAMA SETHU AREA
The research article as outlined above can be read in the following link:-
http://www.scribd.com/doc/156149708/Ramayana-FACTS-EVIDENCES-K-Gopalakrishnan-July-2013
