Dolmens in Ireland

Megalithic Monuments in the Emerald Isle

Jeremiah (NASB) 31:
20  "IS EPHRAIM MY DEAR SON?
IS HE A DELIGHTFUL CHILD?
INDEED, AS OFTEN AS I HAVE SPOKEN AGAINST HIM,
I CERTAINLY STILL REMEMBER HIM;
THEREFORE, MY HEART YEARNS FOR HIM;
I WILL CERTAINLY HAVE MERCY ON HIM," DECLARES THE LORD.

21 "SET UP ROADMARKS FOR YOURSELF,
PLACE GUIDEPOSTS FOR YOURSELF;
DIRECT YOUR MIND TO THE HIGHWAY,
THE WAY BY WHICH YOU WENT.
RETURN, O VIRGIN OF ISRAEL,
RETURN TO THESE YOUR CITIES.
"Radak" (Rabbi David Kimchi, 1157-1236) of Narbonne, France) says:

"SET UP ROADMARKS FOR YOURSELF" (Jeremiah 31): This was directed to the Community of Israel, that in the generation when they would be exiled they should set up roadmarks [i.e. "tsionim"] such as PILED-UP STONES OR STONE MONUMENTS. The purpose of these monuments was to mark the paths [of migration for the sake of future recognition]. The meaning was to say that even though you will be exiled, hope is not lost and you are still destined to return to these your cities. "MAKE YOURSELF HIGH HEAPS" [Hebrew: "tamrurim"]. The same message is repeated though the wording is changed since both "tamrurim" [i.e. "high heaps"] and "tsionim" (i.e. "waymarks") connote elevated-height [from the root "tamar"].

Major Types of Megaliths in Ireland 

Adapted from:
Irish megalithic tombs
https://en.wikipedia.org/wiki/Irish_megalithic_tombs

Megalithic monuments in Ireland typically represent one of several types of megalithic tombs: court cairns, passage tombs, portal tombs and wedge tombs. The remains of over 1,000 such megalithic tombs have been recorded around Ireland.

Types
(1. Court tombs
These tombs have an open east-facing entrance court which leads into a number of rectangular chambers (up to four). The chambers are roofed on the inside by corbelling. Each of these chambers may contain inhumations and cremated remains. Surrounding these chambers is a low dry stone wall with orthostats at the extremities. Sometimes they are called a lobster-claw cairn. COURT CAIRNS
The court cairn is also found (about 100) in Western Scotland. The similar layout of tombs found in Ireland and Scotland and the close geographical location of these tombs, separated by the narrow Irish Channel, indicates that these populations moved back and forth on a regular basis between the two countries.
There are over 390 court cairns recorded in Ireland, with a majority of monuments found in the northern third of the island.  Thirty percent of all Irish neolithic monuments are court cairns. 

In Scotland this appears to be the Bronze and Iron Age area of the Domnonii (Tribe of Dan) and the Brigantes (Tribe of Asher) so too in Ulster it is associated with Donn of Dan and Emain Macha.

Crevykill, Sligo.

(2. Passage tombs

The passage tomb is a large mound of earth or stone with a narrow passage leading from outside to a central chamber or chambers. Examples of this type include Newgrange, Knowth, and Dowth. Irish Passage Tomb art believed to be derived from Brittany in France (see BAMBU-21, no.4). This, along with other points links them to the veneti of Brittany and the the Tribe of Asher,

A related type are Chambered Cairns. Some chambered cairns are also passage-graves. They are found throughout Britain and Ireland, with the largest number in Scotland.

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 (3. Portal tombs

Portal tombs (often referred to as dolmens) are mainly located in the northern half of the country. Such tombs have a straight sided chamber often narrowed at the rear. The entrance is marked by tall portal stones. On top lies a huge single cap stone resting on the portal stones on the front and sloping at the rear where it rests on the backstone. In the majority of cases the tomb entrance faces the east towards the sunrise. This is not always the case though as many tombs face different directions. Examples of portal tombs include Kilmogue, County Kilkenny; Poulnabrone in the Burren, County Clare; and Knockeen, County Waterford.

(4. Wedge tombs
These tombs are generally found in the west and north west of Ireland. Their sloping roof and narrowing walls at one end produce their characteristic wedge shape.

2. Distribution by Province.

The number and location of tombs in each province of Ireland are recorded by the Irish National Monument Service (Republic of Ireland) and in the Northern Ireland Sites & Monuments Record (Northern Ireland).
 The distribution of each type of tomb, by province, can be summarised as:

Many hundreds of other "unclassified" megalithic tombs and sites are also recorded.
Dolmens  (Megaliths) in Ireland: Tribal Differences.

Portal 

Altogether 4 types of Dolemens are foun in ireland possibly represetning 4 different ethnic groups or Tribes. In Israel 12 types of dolmen are found. All 12 are represented by finds at Rogem Hiri (Rujm el-Hiri) where the dolmens werre used for astronomical calacularions as were those of  Ireland.

Rogem Hiri in the Golan, Israel.

f ireland.